AIDS-192887 AIDS192887 Carbonic acid, ethyl (7aR,15aR)-5,5a,13,13a-tetrahydro-13-hydroxy-7,15-dioxo-8H,16H-7a,15a-epidithio-7H,15H-bisoxepino[3',4':4,5]pyrrolo[1,2-a:1',2'-d]pyrazin-5-yl ester