1-苯甲酰基-4-羟基-哌啶-3-羧酸乙酯

去甲槟榔碱氢溴酸盐

3,3'-亚氨基二丙酸二乙酯

3,3'-benzoylimino-di-propionic acid diethyl ester

ethyl 1-benzoyl-4-oxo-3-piperidinecarboxylate