It’s only fair to share… Ibuzatrelvir PF-07817883 CAS 2755812-39-4 Molecular Weight 489.49 Formula C21H30F3N5O5 Ibuzatrelvir (development code PF-07817883) is an experimental antiviral drug being developed by Pfizer for the treatment of COVID-19.[1] It is a second-generation improvement over nirmatrelvir which has a similar chemical structure.[2] One of the disadvantages of nirmatrelvir is that it has low metabolic stability and must be given in combination with ritonavir (as Paxlovid) to limit its …