4-Benzylmorpholine-2-carboxylic acid hydrochloride135072-15-031 % similar 1-Benzylpiperidine-4-carboxylic acid10315-07-831 % similar Methyl 3-methylthiophene-2-carboxylate81452-54-231 % similar Ethyl 1-benzylpiperidine-3-carboxylate72551-53-230 % similar Tolperisone hydrochloride3644-61-930 % similar