[5-(1-ethylsulfanyl-ethylidene)-4-oxo-2-thioxo-thiazolidin-3-yl]-acetic acid ethyl ester 、
[5-(2-{4-[(3-ethyl-3H-benzoselenazol-2-yliden)-ethylidene]-3-methyl-5-oxo-thiazolidin-2-yliden}-1-ethylmercapto-ethyliden)-4-oxo-2-thioxo-thiazolidin-3-yl]-acetic acid ethyl ester 生成 (2-[2-(3-ethoxycarbonylmethyl-4-oxo-2-thioxo-thiazolidin-5-yliden)-2-ethylmercapto-ethyliden]-5-(2-{4-[(3-ethyl-3
H-benzoselenazol-2-yliden)-ethylidene]-3-methyl-5-oxo-thiazolidin-2-yliden}-1-ethylmercapto-ethyliden)-4-oxo-thiazolidin-3-yl]-acetic acid ethyl ester