4-Butoxy-3-methylbenzoic acid 3-(dimethylamino)propyl ester hydrochloride 67032-41-1 BENZOIC ACID, 4-BUTOXY-3-METHYL-, 3-(DIMETHYLAMINO)PROPYL ESTER, HYDROCHLORIDE gamma-Dimethylaminopropyl-3-methyl-4-butoxy benzoate hydrochloride