4-氧代四氢呋喃-3-羧酸乙酯

ethyl 2,2-dichlorocyclopropane-1-carboxylate

7,7-dimethyl-3,4,6,8-tetrahydro-1H-quinoline-2,5-dione

ethyl 4-oxoundeca-7,10-dienoate

diethyl 2-nitropentanedioate