十六烷基丙二酸二乙酯

ethyl 1-benzyl-4,5-dioxopyrrolidine-3-carboxylate

Ethyl 3-cyano-2-oxopropanoate

ethyl 2-oxohept-6-enoate

1-[(6-chloropyridin-3-yl)methyl]piperazine-2,3-dione