甲基 3,4-二氢-3-氧-2H-1,4-苯噻嗪-2-醋酸酯

2-(hexylamino)-4-methoxy-4-oxobutanoate

2-(2-氨基-4-氧代-1,3-噻唑-5-基)乙酸

(2-Amino-4-oxo-4,5-dihydro-thiazol-5-yl)-acetic acid methyl ester

methyl 4-chloro-4-oxobut-2-enoate