1-(1,1-Diphenyl-4-dimethylaminobutyl)diphenylphosphine oxide hydrochloride 51713-31-6 Phosphine oxide, diphenyl((1,1-diphenyl-4-dimethylamino)butyl)- Phosphine oxide, diphenyl((alpha-phenyl-alpha-(3-dimethylamino)propyl)benzyl)-, hydrochloride