{[2-(butylamino)ethylthio]methyl}-4-oxo-4-(3-pyridyl)butanoate 、
2-cyclopentyl propionyl chloride 生成 ethyl 3-({2-[3,-Difluorophenyl)-N-Butylcarbonylamino]ethylthio}methyl)-4-oxo-4-(3-pyridyl)butanoate 、
ethyl 3-{[2-(N-Butyl-3-cyclopentylpropanoylamino)ethylthio]methyl}-4-oxo-4-(pyridin-3-yl)butanoate