diethyl 3-oxo-2-pentylpentanedioate

1,3-二氧戊环-2,2-二乙酸二乙酯

3-氧代-3-(丙基氨基)丙酸乙酯

N,N'-bis(4-methylphenyl)-3-oxopentanediamide

N,N'-bis(4-chlorophenyl)-3-oxopentanediamide