3-Carbethoxy-1-methyl-4-piperidyl p-aminobenzoate hydrochloride 3-Ethoxycarbonyl-1-methyl-4-piperidyl p-aminobenzoate hydrochloride 3-Piperidinecarboxylic acid, 4-hydroxy-1-methyl-, ethyl ester, p-aminobenzoate, hydrochloride 78219-26-8 Ethyl 4-hydroxy-1-methyl-3-piperidinecarboxylate p-aminobenzoate hydrochloride