3-氨基戊二酸二甲酯

N-(2,6-dioxooxan-4-yl)-4-methylbenzenesulfonamide

(4-氧代-3,4-二氢-2H-苯并噻喃-2-基)乙酸

methyl 2-(6-chloro-4-oxo-2,3-dihydrothiochromen-2-yl)acetate

dimethyl 2-cyano-3-(2-methoxy-2-oxoethyl)pentanedioate