8H,16H-7a,15a-Epidithio-7H,15H-bisoxepino[3',4':4,5]pyrrolo[1,2-a:1',2'-d]pyrazine-5,7,15(5aH)-trione, 13,13a-dihydro-13-hydroxy-, (7aR,15aR)- AIDS-192885 AIDS192885