methyl 1-benzyl-2,4-dioxo-3-piperidinecarboxylate

1-Benzyl-4-methoxy-5,6-dihydropyridin-2(1H)-one

N-benzyl-4-hydroxypiperidin-2-one

methyl 5-(benzylamino)-3-oxopentanoate hydrochloride

2,4-二哌啶酮-1-甲酸叔丁酯