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Conatus Pharmaceuticals is a biotechnology company focused on the development and commercialization of novel medicines to treat liver disease. We are developing our lead compound, emricasan, for the treatment of patients with chronic liver disease and acute exacerbations of chronic liver disease. Emricasan is a first-in-class, orally active pan-caspase protease inhibitor designed to reduce the activity of all ten human caspases, which are enzymes that mediate inflammation and cell death, or apoptosis. We believe that by reducing the activity of these enzymes, emricasan has the potential to interrupt the progression of liver disease and potentially provide treatment options in multiple areas of liver disease. We have observed compelling preclinical and clinical trial results that suggest emricasan may have clinical utility in slowing progression of liver diseases regardless of the original cause of the disease. To date, emricasan has been studied in over 500 subjects in ten clinical trials. In a randomized Phase 2b clinical trial in patients with liver disease, emricasan demonstrated a statistically significant, consistent, rapid and sustained reduction in elevated levels of two key biomarkers of inflammation and cell death, alanine aminotransferase, or ALT, and cleaved Cytokeratin 18, or cCK18, respectively, both of which are implicated in the severity and progression of liver disease.

We have designed a comprehensive clinical program to demonstrate the therapeutic benefit of emricasan across the spectrum of fibrotic liver disease. Our initial development strategy targets indications for emricasan with high unmet clinical need and small, potentially orphan, patient populations, such as patients with acute-on-chronic liver failure, or ACLF, and chronic liver failure, or CLF. ACLF and CLF are potential orphan indications in both the United States and European Union, or the EU. We also plan to evaluate the compound in patients who have developed liver fibrosis post-orthotopic liver transplant, or POLT, due to hepatitis C virus, or HCV, infection and have subsequently achieved sustained viral response, or SVR, following anti-HCV therapy, or POLT-HCV-SVR, as well as in patients with non-alcoholic steatohepatitis, or NASH. We were granted orphan drug designation in late 2013 by the United States Food and Drug Administration, or the FDA, for the treatment of POLT patients with reestablished fibrosis to delay the progression to cirrhosis and end-stage liver disease.