9H-Imidazo[1,2-d]dipyrido[2,3-b:3',2'-f][1,4]diazepine, 12-[2-[(3,4-dihydro-2,2-dioxido-1H-2,1-benzothiazin-5-yl)oxy]ethyl]-9-ethyl-3-methyl- AIDS-210660 AIDS210660