(5-ethoxymethylene-4-oxo-2-thioxo-thiazolidin-3-yl)-acetic acid ethyl ester 、
硫酸二甲酯 、
2-methyl-isochromeno[4,3-d]thiazol-5-one 生成 {5-[2-(1-methyl-5-oxo-1
H,5
H-isochromeno[4,3-
d]thiazol-2-ylidene)-ethylidene]-4-oxo-2-thioxo-thiazolidin-3-yl}-acetic acid ethyl ester