12-Acetyl-12H-benzo[f]indolo[3,2-b][1,8]naphthyridin-5-yl 4-methylphenyl ether 12-Acetyl-5-(4-methylphenoxy)-12H-benzo[f]indolo[3,2-b][1,8]naphthyridine AIDS-139362 AIDS139362 NSC648402