3-甲基异噻唑-4-羧酸乙酯

methyl 3-methylisothiazole-4-carboxylate

dimethyl 3-methyl-1,2-thiazole-4,5-dicarboxylate

methyl 3-amino-2-thioformylbut-2-enoate

2-Butenoic acid, 3-amino-2-(thioxomethyl)-, ethyl ester