—Corporate Collaboration” will be terminated according to the terms of the respective agreement underlying such collaborations. Although we do not expect that any of our technology licenses or academic licenses will be terminated in the near term, we cannot guarantee that our partners to such agreements will not seek to terminate their agreements with us. The loss of any of these agreements, or the rights we receive under such agreements, may materially adversely affect the aggregate value of our remaining potential products and technologies and may prevent us from carrying our any strategic opportunity that may be available to us, which would materially adversely affect our business results of operations and financial condition.

Moreover, certain of our collaboration, contract research, license and other agreements are silent with respect to, or contain prohibitions on, our ability to assign such agreements in the event of certain business combinations and assets sales. Although we generally believe that we have the right to assign a substantial majority of our agreements if we determine to pursue certain types of business combinations, we cannot assure you that our partners to such agreements would not seek to prevent or delay the assignment of such agreements, which might render potential strategic partners less willing to negotiate with us and decrease the value of our remaining potential products and technologies.

Our stock price could be adversely affected by dispositions of our shares pursuant to registration statements currently in effect.

Some of our current stockholders hold a substantial number of shares, which they are currently able to sell in the public market under certain registration statements currently in effect, or otherwise. Sales of a substantial number of our shares or the perception that these sales may occur, could cause the trading price of our common stock to fall and could impair our ability to raise capital through the sale of additional equity securities.

As of June 30, 2006, we had issued and outstanding 17,087,737 shares of our common stock. This amount does not include, as of June 30, 2006:

·        approximately 3.7 million shares of our common stock issuable upon the exercise of all of our outstanding options and the release of restricted stock awards; and

·        approximately 4.7 million shares of our common stock issuable upon the exercise of all of our outstanding warrants.

These shares of common stock, if and when issued, may be sold in the public market assuming the applicable registration statements continue to remain effective and subject in any case to trading restrictions to which our insiders holding such shares may be subject from time to time. If these options or warrants are exercised and sold, our stockholders may experience additional dilution and the market price of our common stock could fall.

We must be able to continue to secure additional financing in order to continue our operations, which might not be available or which, if available, may be on terms that are not favorable to us.

Our ability to pursue any strategic alternative that may be available to us or to engage in any future development and clinical testing of our potential products will require substantial additional financial resources. Our future funding requirements will depend on many factors, including:

Our ability to pursue any strategic opportunity that may be available to us or to engage in any future development and clinical testing of our potential products will require substantial additional financial resources. Our future funding requirements will depend on many factors, including:

·        any strategic alternative we may choose to pursue;

·        future reductions in our remaining staff;

·        our financial condition;

·        developments related to our collaboration agreements, license agreements, academic licenses and other material agreements;

·        changes in our eligibility for continued listing of our common stock on The Nasdaq Capital Market;

·        progress and results of our clinical trials and preclinical studies;

·        time and costs involved in obtaining FDA and other regulatory approvals;

·        scientific progress in our research and development programs;

·        size and complexity of such programs;

·        our ability to establish and maintain corporate collaborations;

·        the time and costs involved in filing, prosecuting and enforcing patent claims;

·        competing technological and market developments; and

·        the cost of manufacturing material for preclinical, clinical and commercial purposes.

We may have insufficient working capital to fund our cash needs unless we are able to raise additional capital in the future. We have financed our operations to date primarily through the sale of equity securities and through corporate collaborations. We do not anticipate generating revenues for the foreseeable future and may fund our operations through additional third party financing or other means. If we raise additional funds by issuing equity securities, substantial dilution to existing stockholders may result. We may not be able to obtain additional financing on acceptable terms, or at all. Any failure to obtain an adequate and timely amount of additional capital on commercially reasonable terms will have a material adverse effect on our business and financial condition, including our viability as an enterprise. As a result of these concerns, management is assessing, and may pursue, strategic alternatives, including the sale or merger of the business, the sale of certain assets or other actions.

We may also take actions to conserve our cash resources through further reductions in our personnel or by relinquishing greater or all rights to our potential products at an earlier stage of development or on less favorable terms than we otherwise would. Any or all of these actions could have a material adverse affect on our business.

We may become involved in securities class action litigation that could divert management’s attention and harm our business.

The market price of development stage companies is typically volatile. When there is a sharp drop in the stock price of a development stage company, stockholder class actions may be filed against the company. Our stock price dropped substantially following our July 2006 announcement regarding the negative results of our clinical trial for VLTS 934 and has traded below $1.00 per share since our announcement. We do not anticipate that the price of our common stock will significantly increase in the short term. As a result, we may become involved in securities litigation in the future. Litigation often is expensive and diverts management’s attention and resources, which could adversely affect our business.

Due to our financial condition, we may be unable to attract and retain corporate or academic partners to develop, introduce and market our remaining potential products and technologies.

Our business strategy has been to attract business partners to fund or conduct research and development, clinical trials, manufacturing, marketing and sales of our potential products and technologies. We face intense competition from many other companies in the pharmaceutical and biotechnology industries for corporate collaborations, as well as for establishing relationships with academic and research institutions and for obtaining licenses to proprietary technology. Our financial condition will substantially reduce our ability to attract and retain current and potential corporate and academic partners, which will reduce our ability to develop, introduce and market our potential products and could adversely affect our business.

In addition, as a result of our recent announcements concerning VLTS 934 and our recent restructuring activities, our existing partners may not devote sufficient resources to the development, introduction and marketing of our remaining potential products or technologies or may elect to cease pursuing further development and commercialization of potential products or technologies resulting from collaborations with us. If any of our corporate or academic partners elects to terminate its relationship with us, the value of our remaining assets may be materially adversely affected. We may not be able to negotiate alternative corporate or academic partnership agreements on acceptable terms, or at all.

Our potential products are subject to extensive regulatory approval by the FDA and others, including with regard to completion of clinical trials, which is expensive, time consuming and uncertain. We cannot assure you that any of our remaining potential products or technologies will be approved.

We are subject to significant regulatory requirements, including the successful completion of clinical trials, prior to the commercialization of our potential products. Under the Federal Food, Drug and Cosmetic Act, the Public Health Services Act, and related regulations, the Food and Drug Administration, or FDA, regulates the development, clinical testing, manufacture, labeling, sale, distribution and promotion of drugs and biologics in the United States. Prior to market introduction in the United States, a potential drug or biological product must undergo rigorous clinical trials that meet the requirements of the FDA in order to demonstrate safety and efficacy in humans. Depending upon the type, novelty and effects of the drug and the nature of the disease or disorder to be treated, the FDA approval process can take several years, require extensive clinical testing and result in significant expenditures.

Clinical trials and the FDA approval process are long, expensive and uncertain processes, which require substantial time, effort and financial and human resources. We have limited experience in conducting clinical trials, and we may encounter problems or fail to demonstrate the efficacy or safety that cause us, or the FDA, to delay, suspend or terminate the development of any potential products. For example, in July 2006, we announced that our Phase IIb clinical trial for VLTS 934 in patients with peripheral arterial disease failed to meet its primary or any of its secondary endpoints. We have no plans for further development of VLTS 934 and we have terminated our Phase IIb clinical trial. We had

previously devoted substantially all of our research, development and clinical efforts and financial resources toward the development VLTS 934.

Although we have a pipeline of remaining potential products and technologies, we have no current plans for the further commercial development of any of our potential products or technologies. Even were we able to continue development of any of our potential products, clinical trials are long, expensive and uncertain processes during which we may encounter difficulties completing the trial. Problems we may encounter include the unavailability of preferred sites for conducting the trials, an insufficient number of eligible subjects, changes in the number of subjects based on the performance of interim analyses, changes in protocol and other factors, which may delay the advancement of our clinical trials, lead to increased costs or result in the termination of the clinical trials altogether. Furthermore, the FDA may suspend clinical trials at any time if it believes the subjects participating in the trials are being exposed to unacceptable health risks or if it finds deficiencies in the clinical trial process or the conduct of the investigation.

We cannot assure you that clinical testing for any of our remaining potential products will be completed within any specific time period, if at all. There can be no assurance that any FDA approval will be granted on a timely basis, if at all, or that any of our potential products will prove safe and effective in all required clinical trials or will meet all applicable regulatory requirements necessary to receive marketing approval from the FDA. In addition, should any other future clinical trials for our potential products fail to demonstrate a statistically significant therapeutic drug effect and/or show that our potential products are safe for the targeted patient population, our business and prospects could be harmed, the market price of our common stock could fall, our ability to generate revenues from those potential products could be adversely affected, delayed or prevented entirely, and we may not be able to obtain additional financing on acceptable terms, or at all.

Even if we successfully obtain FDA approval for our potential products, we may not be able to obtain the regulatory approvals necessary to market our potential products outside the United States since the commercialization of our potential products outside the United States will be subject to separate regulations imposed by foreign government agencies. The approval procedures for marketing outside the United States vary among countries and can involve additional testing. Accordingly, we cannot predict with any certainty how long it will take or how much it will cost to obtain regulatory approvals for manufacturing and marketing our potential products within and outside the United States or whether we will be able to obtain those regulatory approvals at all. Our failure to successfully complete any necessary clinical trials, and obtain FDA and any applicable foreign government approvals, or any delays in receipt of such approvals, could have a material effect on our business, results of operations and financial condition.

We face strong competition in the markets we have targeted from other companies with substantially greater experience, financial resources and name recognition than us, and competition from alternative treatments in the biopharmaceuticals market. If our potential products and technologies do not remain competitive, their value may be materially diminished.

The pharmaceutical and biotechnology industries are highly competitive. We are aware of several pharmaceutical and biotechnology companies that are pursuing peripheral arterial disease therapeutics that compete with our remaining potential products and technologies. For example, we are aware that AnGes MG, Centelion/Gencell SAS, NicOx, Sigma Tau, Inc., Nissan Chemical, Mitsubishi Pharmaceuticals, Kos Pharmaceuticals, Endovasc, Sangamo BioSciences, Inc. and Otsuka Pharmaceutical Co., Ltd. have engaged or are engaged in developing biotechnology or pharmaceutical therapies. Many of these companies are addressing diseases that have been targeted by us directly or through our corporate partners, and many of them may have more experience in these areas and substantially greater financial, research, product development, manufacturing, marketing and technical resources than we have. Some companies also have greater name recognition than us and long-standing collaborative relationships. Our

competitive position depends on a number of factors, including safety, efficacy, reliability, marketing and sales efforts, and existence of competing products, and treatments and general economic conditions. If our remaining potential products and technologies do not remain competitive in light of these factors, their value may be materially diminished, which would adversely affect our business prospects.

Our competitors, academic and research institutions or others may develop safer, more effective or less costly cardiovascular therapies, biologic delivery systems, gene-based therapeutics or chemical-based therapies. In addition, competitors may achieve superior patent protection or obtain regulatory approval or product commercialization earlier than we do. Any such developments could seriously harm our business, financial condition and results of operations.

Adverse events in the field of cardiovascular therapies may negatively impact regulatory approval or public perception of our potential products and technologies.

The FDA may become more restrictive regarding the conduct of clinical trials including cardiovascular therapies. This approach by the FDA could lead to delays in the timelines for regulatory review, as well as potential delays in the conduct of clinical trials. In addition, negative publicity may affect patients’ willingness to participate in clinical trials. If fewer patients are willing to participate in clinical trials, the timelines for recruiting patients and conducting such trials will be delayed. The commercial success of our potential products and technologies will depend in part on public acceptance of the use of our therapies for the prevention or treatment of human diseases. Negative public reaction to our therapies in general could result in stricter labeling requirements of products, including any of our potential products, and could cause a decrease in the demand for products we may develop, if any.

If we are unable to obtain rights to required technologies including poloxamer, proprietary gene sequences, proteins or other technologies, we will be unable to operate our business.

Our remaining potential products involve multiple component technologies, many of which may be patented by others. For example, our potential products can use poloxamers, proprietary gene sequences, proteins or other technologies some of which have been, or may be, patented by others. As a result, we may be required to obtain licenses or acquire rights to those poloxamers, gene sequences, proteins or other technologies. We may not be able to obtain a license or acquire rights to those technologies on reasonable terms, or at all. As a consequence, we may be prevented from developing potential products or we may have to make cumulative royalty payments to several companies. These cumulative royalties would reduce amounts paid to us or could make our potential products too expensive to develop or market. From time to time, we may engage in preliminary discussions with third parties concerning potential acquisitions of technologies, products or product candidates. Even if we are successful in acquiring technologies, products or product candidates, we may experience difficulties in and costs associated with the assimilation of technologies, products, product candidates, operations and personnel acquired, diversion of management’s attention from other business concerns, inability to maintain uniform standards, controls, procedures and policies and the subsequent loss of key personnel. If we are unable to acquire or obtain rights to technologies, products or product candidates necessary for our business, our business would be harmed.

We rely on patents and other proprietary rights to protect our intellectual property and any inability to protect our intellectual property rights would adversely impact our business.

We rely on a combination of patents, trade secrets, trademarks, proprietary know-how, and nondisclosure and other contractual agreements and technical measures to protect our intellectual property rights. We file patent applications to protect processes, practices and techniques related to our potential products that are significant to the development of our business. We own or have exclusive rights to 39 issued United States patents and 45 granted foreign patents. We own or have exclusive rights to approximately 12 pending patent applications in the United States and 34 foreign pending patent applications. Our patent applications may not be approved. Any patents granted now or in the future may be invalidated or offer only limited protection against potential infringement and development by our competitors of competing products. Moreover, our competitors, many of which have substantial resources and have made substantial investments in competing technologies, may seek to apply for and obtain patents that will prevent, limit or interfere with our ability to make, use or sell our potential products either in the United States or in international markets. In addition to patents, we rely on trade secrets and proprietary know-how, which we seek to protect, in part, through proprietary information agreements with employees, consultants and other parties. Our proprietary information agreements with our employees and consultants contain industry standard provisions requiring such individuals to assign to us, without additional consideration, any intellectual property conceived or reduced to practice by them while employed or retained by us, subject to customary exceptions. Proprietary information agreements with employees, consultants and others may be breached, and we may not have adequate remedies for any breach. Also, our trade secrets may become known to, or independently developed by, competitors. Any failure to protect our intellectual property would significantly impair our competitive position and adversely affect our results of operations and business.

We could become subject to litigation regarding our intellectual property rights, which could seriously harm our business.

In previous years, there has been significant litigation in the United States involving patents and other intellectual property rights. Competitors in the biotechnology industry may use intellectual property litigation against us to gain advantage. In the future, we may be a party to litigation to protect our intellectual property or as a result of an alleged infringement of others’ intellectual property. These claims and any resulting lawsuit, if successful, could subject us to significant liability for damages and invalidation of our proprietary rights. Any potential intellectual property litigation, if successful, also could force us to stop selling, incorporating or using our potential products that use the challenged intellectual property; obtain from the owner of the infringed intellectual property right a license to sell or use the relevant technology, which license may not be available on reasonable terms, or at all; or redesign our potential products that use the technology. We may also be required in the future to initiate claims or litigation against third parties for infringement of our intellectual property rights to protect such rights or determine the scope or validity of our intellectual property or the rights of our competitors. The pursuit of these claims could result in significant expenditures and the diversion of our technical and management personnel and we may not have sufficient cash and manpower resources to pursue any such claims. If we are forced to take any of these actions, our business may be seriously harmed.

Any claims, with or without merit, and regardless of whether we prevail in the dispute, would be time-consuming, could result in costly litigation and the diversion of technical and management personnel and could require us to develop non-infringing technology or to enter into royalty or licensing agreements. An adverse determination in a judicial or administrative proceeding and failure to obtain necessary licenses or develop alternate technologies could prevent us from developing and selling our potential products, which would have a material adverse effect on our business, results of operations and financial condition.

We may experience delays in the commercial introduction, manufacture or regulatory approval of our potential products as a result of failure to comply with FDA manufacturing practices and requirements.

Drug-manufacturing facilities regulated by the FDA must comply with the FDA’s current good manufacturing practice (cGMP) regulations, which include quality control and quality assurance requirements, as well as maintenance of records and documentation. Manufacturers of biologics also must comply with the FDA’s general biological product standards and may be subject to state regulation as well. Such manufacturing facilities are subject to ongoing periodic inspections by the FDA and corresponding state agencies, including unannounced inspections, and must be licensed as part of the product approval process before being utilized for commercial manufacturing. Noncompliance with the applicable requirements can result in, among other things, fines, injunctions, civil penalties, recall or seizure of products, total or partial suspension of production, withdrawal of marketing approvals, and criminal prosecution. Any of these actions by the FDA would materially and adversely affect our ability to continue clinical trials, commercialize our potential products and adversely affect our business. We cannot assure you that we or any of our existing or future contract manufacturers will attain or maintain compliance with current or future good manufacturing practice requirements and the FDA could suspend or further delay our clinical trials, the commercial introduction and manufacture of our potential products or place restrictions on our ability to conduct clinical trials or commercialize our potential products, including the mandatory withdrawal of the potential product from the clinical trials.

Our research and development processes involved the controlled use of hazardous materials, chemicals and radioactive materials and produce waste products that could subject us to unanticipated environmental liability and would adversely affect our results of operations. We are subject to federal, state and local environmental laws and regulations governing the use, manufacture, storage, handling and disposal of such materials and waste products. Although we believe that our safety procedures for handling and disposing of such materials complied with the standards prescribed by such laws and regulations, the risk of accidental contamination or injury from these materials cannot be eliminated completely. In the event of such an accident, we could be held liable for any damages that result, and any such liability could exceed our resources. Although we believe that we are in compliance in all material respects with applicable environmental laws and regulations, there can be no assurance that we will not be required to incur significant costs to comply with environmental laws and regulations in the future or that any of our operations, business or assets will not be materially adversely affected by current or future environmental laws or regulations.

If we are unable to complete our assessment as to the adequacy of our internal control over financial reporting within the required time periods as required by Section 404 of the Sarbanes-Oxley Act of 2002, or in the course of such assessments identify and report material weaknesses in our controls, investors could lose confidence in the reliability of our financial statements, which could result in a decrease in the value of our common stock.

As directed by Section 404 of the Sarbanes-Oxley Act of 2002, the Securities and Exchange Commission adopted rules requiring public companies to include a report of management on internal control over financial reporting in their Annual Reports on Form 10-K. This report is required to contain an assessment by management of the effectiveness of a company’s internal control over financial reporting. In addition, the independent registered public accounting firm auditing a public company’s financial statements must attest to and report on management’s assessment of the effectiveness of the company’s internal control over financial reporting. Our current non-affiliated market capitalization qualifies us as a non-accelerated filer. As such, we are required to comply with the Section 404 requirements beginning with the fiscal year that ends June 30, 2008. We intend to diligently and vigorously assess (and enhance as may be appropriate) our internal control over financial reporting in order to ensure compliance with the Section 404 requirements. We anticipate expending significant resources in developing the necessary documentation and testing procedures required by Section 404, however, there is a risk that we will not

comply with all of the requirements imposed by Section 404. In addition, the very limited size of our organization could lead to conditions that could be considered material weaknesses, such as those related to segregation of duties, that is possible in larger organizations but significantly more difficult in smaller organizations. Also, controls related to our general information technology infrastructure may not be as comprehensive as in the case of a larger organization with more sophisticated capabilities and more extensive resources. It is not clear how such circumstances should be interpreted in the context of an assessment of internal control over financial reporting. If we fail to implement required new or improved controls, we may be unable to comply with the requirements of Section 404 in a timely manner, which may result in our independent registered public accounting firm issuing a qualified or adverse report on our internal control and/or management’s assessment thereof. This could result in an adverse reaction in the financial markets due to a loss of confidence in the reliability of our financial statements, which could cause the market price of our common stock to decline.

Our certificate of incorporation and by-laws include anti-takeover provisions that may enable our management to resist an unwelcome takeover attempt by a third party.

Our basic corporate documents and Delaware law contain provisions that enable our management to attempt to resist a takeover unless it is deemed by management and our Board of Directors to be in the best interests of our stockholders. Those provisions might discourage, delay or prevent a change in the control of our company or a change in our management. Our Board of Directors may also choose to adopt further anti-takeover measures without stockholder approval. The existence and adoption of these provisions could adversely affect the voting power of holders of common stock and limit the price that investors might be willing to pay in the future for shares of our common stock.

The concentration of ownership among our executive officers, directors and their affiliates may delay or prevent a change in our corporate control.

Our executive officers, directors and their affiliates beneficially own or control in excess of approximately 22% of outstanding common shares, warrants or options to purchase common stock, with approximately 15% of outstanding common shares, warrants and options to purchase common stock held by Perseus-Soros BioPharmaceutical Fund, L.P. As a result, our executive officers, directors and their affiliates will be able to exercise significant control over all matters requiring stockholder approval, including the election of directors and approval of significant corporate transactions, which could delay or prevent an outside party from acquiring or merging with us, which could in turn reduce our stock price.

If our facilities were to experience an earthquake or other catastrophic loss, our operations would be seriously harmed.

Our facilities could be subject to a catastrophic loss such as fire, flood or earthquake. Our corporate headquarters and remaining business operations are located near major earthquake faults in Burlingame, California. Any such loss at any of our facilities could disrupt our operations, delay development of our potential products and result in large expense to repair and replace our facilities. We currently do not maintain insurance policies protecting against catastrophic loss, except for fire insurance with coverage amounts normally obtained in our industry.

ITEM 1B.        UNRESOLVED STAFF COMMENTS

None.