(+-)-1-Methyl-3-benzoyl-(p-aminobenzoyloxy)piperidine hydrochloride 31823-18-4 BENZOIC ACID, p-AMINO-, ESTER with 3-HYDROXY-1-METHYL-3-PIPERIDYL PHENYL KETONE, Benzoic acid, p-amino-, ester with 3-hydroxy-1-methyl-3-piperidyl phenyl ketone, monohydrochloride, (+-)-