7H,15H-Bisoxepino[3',4':4,5]pyrrolo[1,2-a:1',2'-d]pyrazine-7,15-dione, 5,13-bis(acetyloxy)-5,5a,7a,8,13,13a,15a,16-octahydro-7a,15a-bis(methylthio)-, (7aR,15aR)- AIDS-192888 AIDS192888