4-Butoxy-2-hydroxybenzoic acid 3-(2-methylpiperidino)propyl ester hydrochloride 67032-40-0 BENZOIC ACID, 4-BUTOXY-2-HYDROXY-, 3-(2-METHYLPIPERINO)PROPYL ESTER, HYDROCHLORI Benzoic acid, 4-butoxy-2-hydroxy-, 3-(2-methylpiperino)propyl ester, hydrochloride