Sunesis Pharmaceuticals, Inc. Reports Fourth Quarter and Full-Year 2007 Financial Results

SOUTH SAN FRANCISCO, Calif., March 11 /PRNewswire-FirstCall/ -- Sunesis Pharmaceuticals, Inc. , a clinical-stage biopharmaceutical company focused on the discovery, development and commercialization of novel small-molecule therapeutics, today reported financial results for the quarter and fiscal year ended December 31, 2007.

Total revenue for the fourth quarter of 2007 was $2.0 million, with a net loss of $8.8 million. Total revenue for the year ended December 31, 2007 was $9.7 million, with a net loss of $38.8 million. As of December 31, 2007, cash, cash equivalents and marketable securities totaled $47.7 million, and debt totaled $2.3 million. Net cash used in operating activities in 2007 was $34.5 million.

Recent Highlights

-- This week at the 39th Annual Meeting on Women's Cancer hosted by the Society for Gynecologic Oncology in Tampa, Florida, Sunesis presented positive interim results from the company's ongoing Phase 2 clinical trial of SNS-595, a novel naphthyridine analog, in advanced platinum-resistant ovarian cancer patients.

Conference Call Information

Sunesis' management will host a conference call to review the results of the fourth quarter and the 2007 fiscal year today at 10:30 a.m. EDT. Individual and institutional investors can access the call via 877-604-9668 (U.S. and Canada) or 719-325-4904 (international). To access the live audio webcast or the subsequent archived recording, visit the "Investors and Media - Calendar of Events" section of the Sunesis website at http://www.sunesis.com. Please log on to Sunesis' website several minutes prior to the start of the presentation to ensure adequate time for any software download that may be necessary. A replay of the webcast will be archived on the Sunesis website for two weeks until March 25, 2008.

About Sunesis' Oncology Programs

Sunesis has built a portfolio of product candidates in oncology focused on inhibition of the cell-cycle and survival signaling. Our lead product candidate, SNS-595, is a novel naphthyridine analog, structurally related to quinolones, a class of compounds which has not been used previously for the treatment of cancer. SNS-595 is a specific DNA intercalator and topoisomerase II poison, causing replication-dependent site-selective double-strand DNA damage, irreversible G2 arrest and rapid apoptosis. A Phase 2 single agent clinical trial of SNS-595 in ovarian cancer and a Phase 1b clinical trial of SNS-595 combination with cytarabine in relapsed/refractory AML are both ongoing. SNS-032, a potent and selective inhibitor of CDKs 2, 7 and 9, is being evaluated in a Phase 1 clinical trial in patients with relapsed/refractory CLL or multiple myeloma. SNS-314, a potent and selective pan-Aurora kinase inhibitor, is being studied in a Phase 1 dose-escalating clinical trial in patients with advanced solid tumors. In addition, Sunesis is developing novel small molecule inhibitors of Raf kinase and other protein kinases in collaboration with Biogen Idec.

About Sunesis Pharmaceuticals

Sunesis is a clinical-stage biopharmaceutical company focused on the discovery, development and commercialization of novel small-molecule therapeutics for oncology and other serious diseases. Sunesis has built a broad product candidate portfolio through internal discovery and in-licensing of novel cancer therapeutics. Sunesis is advancing its product candidates through in-house research and development efforts and strategic collaborations with leading pharmaceutical and biopharmaceutical companies. For further information on Sunesis Pharmaceuticals, please visit http://www.sunesis.com.

SUNESIS and the logo are trademarks of Sunesis Pharmaceuticals, Inc.

Safe Harbor Statement

This press release contains forward-looking statements including without limitation statements related to the potential safety and efficacy of SNS-595, SNS-032 and SNS-314, planned additional clinical testing and development efforts, the timing of enrollment in clinical trials and the announcement of clinical results. Words such as "look forward," "suggests," "may," "expects," "designed," "believe," "appears" and similar expressions are intended to identify forward-looking statements. These forward-looking statements are based upon Sunesis' current expectations. Forward-looking statements involve risks and uncertainties. Sunesis' actual results and the timing of events could differ materially from those anticipated in such forward-looking statements as a result of these risks and uncertainties, which include, without limitation, the risk that Sunesis' drug discovery and development activities, including enrollment and reporting of results, could be halted significantly or delayed for various reasons, the risk that Sunesis' clinical trials for SNS-595, SNS-032 and/or SNS-314 may not demonstrate safety or efficacy or lead to regulatory approval, the risk that preliminary data and trends may not be predictive of future data or results, the risk that Sunesis' preclinical studies and clinical trials may not satisfy the requirements of the FDA or other regulatory agencies, risks related to the conduct of Sunesis' clinical trials and manufacturing of SNS-595, SNS-032 and SNS-314 and risks related to Sunesis' need for additional funding. These and other risk factors are discussed under "Risk Factors" and elsewhere in Sunesis' annual report on Form 10-K for the year ended December 31, 2006 and other filings with the Securities and Exchange Commission. Sunesis expressly disclaims any obligation or undertaking to release publicly any updates or revisions to any forward-looking statements contained herein to reflect any change in the company's expectations with regard thereto or any change in events, conditions or circumstances on which any such statements are based.

CONTACT: investors, Eric Bjerkholt, SVP, Corporate Development & Finance
of Sunesis Pharmaceuticals, Inc., +1-650-266-3717; or media, Karen L.
Bergman, +1-650-575-1509, or Michelle Corral, +1-415-794-8662, both of BCC
Partners, for Sunesis Pharmaceuticals

Web site: http://www.sunesis.com//

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