1,2,5,6-四氫-1-甲菸鹼酸

甲醇

ethyl 4-hydroxy-1-methylpiperidine-3-carboxylate

1-甲基-4-氧代哌啶-3-羧酸乙酯

N,N-二-(beta-羰基乙氧基乙基)甲胺