Ascletis Announces U.S. IND Filing of Oral 3CLpro Inhibitor ASC11 for COVID-19

-- ASC11 is an in-house discovered oral small molecule drug candidate,targeting 3-chymotrypsin like protease (3CLpro)

-- In antiviral cellular assays with infectious SARS-CoV-2,ASC11 demonstrated higher potency against SARS-CoV-2 than other 3CLpro inhibitors including Nirmatrelvir,S-217622,PBI-0451 and EDP-235,etc.

-- Ascletis owns global intellectual property rights for ASC11

HANGZHOU and SHAOXING,China,Nov. 2,2022 --Ascletis Pharma Inc. (HKEX: 1672,"Ascletis") today announces thatthe Investigational New Drug (IND) application of ASC11,an oral inhibitor drug candidate targeting 3-chymotrypsin like protease (3CLpro) for COVID-19,has been filed to the U.S. Food and Drug Administration (FDA) after the Pre-IND consultation.

In antiviral cellular assays with infectious SARS-CoV-2,etc. ASC11 remains potent antiviral activity against various popular Omicron variants such as BA.1 and BA.5. In the animal model with infectious SARS-CoV-2,ASC11 also showed potent antiviral activity.

ASC11 is an in-house discovered oral small molecule drug candidate using various proprietary technologies including molecular docking. Ascletis has filed global patent applications for ASC11 and related compounds and their use in viral disease.

Ascletis has completed all IND enabling studies for ASC11 including Good Laboratory Practice (GLP) toxicology studies in rats and dogs as of today.

About Ascletis

Ascletis is an innovative R&D driven biotech listed on the Hong Kong Stock Exchange (1672.HK),covering the entire value chain from discovery and development to manufacturing and commercialization. Led by a management team with deep expertise and a proven track record,Ascletis focuses on three therapeutic areas with unmet medical needs from a global perspective: viral diseases,non-alcoholic steatohepatitis (NASH) and oncology. Through excellent execution,Ascletis rapidly advances its drug pipeline with an aim of leading in global competition. To date,Ascletis has three marketed products,i.e. ritonavir tablets,GANOVO® and ASCLEVIR®,and 22 drug candidates in its R&D pipeline. The most advanced drug candidates include ASC22 (HBV functional cure),ASC10 and ASC11(oral small molecules for COVID-19 treatment),ASC40 (recurrent glioblastoma),ASC42 (PBC,primary biliary cholangitis),and ASC40 (acne).

For more information,please visit www.ascletis.com.