4451-88-1 Benzo[a]phenazoxonium, 5-(benzylamino)-9-(diethylamino)-, chloride Benzo[a]phenoxazin-7-ium, 9-(diethylamino)-5-[(phenylmethyl)amino]-, chloride C.I. 51185 NSC9612 Nile Blue 2B Nile Blue BB