An oral SARS-CoV-2 M pro inhibitor clinical candidate for the treatment of COVID-19.
Owen, D.R., Allerton, C.M.N., Anderson, A.S., Aschenbrenner, L., Avery, M., Berritt, S., Boras, B., Cardin, R.D., Carlo, A., Coffman, K.J., Dantonio, A., Di, L., Eng, H., Ferre, R., Gajiwala, K.S., Gibson, S.A., Greasley, S.E., Hurst, B.L., Kadar, E.P., Kalgutkar, A.S., Lee, J.C., Lee, J., Liu, W., Mason, S.W., Noell, S., Novak, J.J., Obach, R.S., Ogilvie, K., Patel, N.C., Pettersson, M., Rai, D.K., Reese, M.R., Sammons, M.F., Sathish, J.G., Singh, R.S.P., Steppan, C.M., Stewart, A.E., Tuttle, J.B., Updyke, L., Verhoest, P.R., Wei, L., Yang, Q., Zhu, Y.(2021) Science 374: 1586-1593
- PubMed: 34726479 
- DOI: https://doi.org/10.1126/science.abl4784
- Primary Citation of Related Structures:  
7RFR, 7RFS, 7RFU, 7RFW - PubMed Abstract: 
The worldwide outbreak of COVID-19 caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) has become a global pandemic. Alongside vaccines, antiviral therapeutics are an important part of the healthcare response to countering the ongoing threat presented by COVID-19. Here, we report the discovery and characterization of PF-07321332, an orally bioavailable SARS-CoV-2 main protease inhibitor with in vitro pan-human coronavirus antiviral activity and excellent off-target selectivity and in vivo safety profiles. PF-07321332 has demonstrated oral activity in a mouse-adapted SARS-CoV-2 model and has achieved oral plasma concentrations exceeding the in vitro antiviral cell potency in a phase 1 clinical trial in healthy human participants.
Organizational Affiliation: 
Pfizer Worldwide Research, Development & Medical, Cambridge, MA 02139, USA.