2H-Imidazol-2-one, {1,3-dihydro-4-[4-(1H-imidazol-1-yl)-} benzoyl\] 4-(4-(1H-Imidazol-1-yl)benzoyl)-5-methyl-1,3-dihydro-2H-imidazol-2-one AIDS-136457 AIDS136457 NSC638021