(4-(4-(2-(Diethylamino)ethyl)-1-piperazinyl)butyl)carbamic acid ethyl ester hydrochloride 24280-44-2 CARBAMIC ACID, (4-(4-(2-(DIETHYLAMINO)ETHYL)-1-PIPERAZINYL)BUTYL)-, ETHYL ESTER, Carbamic acid, (4-(4-(2-(diethylamino)ethyl)-1-piperazinyl)butyl)-, ethyl ester, hydrochloride