PT - JOURNAL ARTICLE AU - Britton Boras AU - Rhys M. Jones AU - Brandon J. Anson AU - Dan Arenson AU - Lisa Aschenbrenner AU - Malina A. Bakowski AU - Nathan Beutler AU - Joseph Binder AU - Emily Chen AU - Heather Eng AU - Jennifer Hammond AU - Robert Hoffman AU - Eugene P. Kadar AU - Rob Kania AU - Emi Kimoto AU - Melanie G. Kirkpatrick AU - Lorraine Lanyon AU - Emma K. Lendy AU - Jonathan R. Lillis AU - Suman A. Luthra AU - Chunlong Ma AU - Stephen Noell AU - R. Scott Obach AU - Matthew N. O’ Brien AU - Rebecca O’Connor AU - Kevin Ogilvie AU - Dafydd Owen AU - Martin Pettersson AU - Matthew R Reese AU - Thomas F. Rogers AU - Michelle I. Rossulek AU - Jean G. Sathish AU - Claire Steppan AU - Martyn Ticehurst AU - Lawrence W. Updyke AU - Yuao Zhu AU - Jun Wang AU - Arnab K. Chatterjee AU - Andrew D. Mesecar AU - Annaliesa S. Anderson AU - Charlotte Allerton TI - Discovery of a Novel Inhibitor of Coronavirus 3CL Protease as a Clinical Candidate for the Potential Treatment of COVID-19 AID - 10.1101/2020.09.12.293498 DP - 2020 Jan 01 TA - bioRxiv PG - 2020.09.12.293498 4099 - http://biorxiv.org/content/early/2020/09/13/2020.09.12.293498.short 4100 - http://biorxiv.org/content/early/2020/09/13/2020.09.12.293498.full AB - COVID-19 caused by the SARS-CoV-2 virus has become a global pandemic. 3CL protease is a virally encoded protein that is essential to the viral life cycle across a broad spectrum of coronaviruses with no close human analogs. The designed phosphate prodrug PF-07304814 is metabolized to PF-00835321 which is a potent inhibitor in vitro of the coronavirus family 3CL pro, with selectivity over human host protease targets. Furthermore, PF-00835231 exhibits potent in vitro antiviral activity against SARS-CoV-2 as a single agent and it is additive/synergistic in combination with remdesivir. We present the ADME, safety, and in vitro antiviral activity data to warrant clinical evaluation.One Sentence Summary The phosphate prodrug PF-07304814 is disclosed as an investigational novel intravenous small molecule 3CL protease inhibitor for COVID-19.Competing Interest StatementA.D.M has a sponsored program contract with Pfizer to test compounds for inhibition of coronavirus proteases. JW has a sponsored research agreement with Pfizer to test compounds for inhibition of coronavirus proteases.