2,4-Imidazolidinedione, 3-(4-(diethylamino)-2-butynyl)-5,5-diphenyl-, monohydrochloride 2718-12-9 3-(4-(Diethylamino)-2-butynyl)-5,5-diphenylhydantoin hydrochloride HYDANTOIN, 3-(4-(DIETHYLAMINO)-2-BUTYNYL)-5,5-DIPHENYL-, HYDROCHLORIDE