4-Ethyl-12-methoxy-3,4-dihydro-2H-[1,4]diazepino[5,6,7-mn]imidazo[4,5,1-de]acridine 4-Ethyl-3,4-dihydro-2H-[1,4]diazepino[5,6,7-mn]imidazo[4,5,1-de]acridin-12-yl methyl ether AIDS-141915 AIDS141915 NSC658357