1,5-Diphenyl-2,2-dimethyl-1-dimethylamino-5-pentanone 2921-06-4 4,4-Dimethyl-5-(dimethylamino)-5-phenylvalerophenone BRN 2812189 Valerophenone, 4,4-dimethyl-5-(dimethylamino)-5-phenyl-