3-cyclopentyl-2-(6-mercaptopyridin-3-yl)-N-thiazol-2-ylpropionamide 、
溴乙酸叔丁酯 以to give tert-butyl {5-[2-cyclopentyl-1-(thiazol-2-ylcarbamoyl)ethyl]pyridin-2-ylsulfanyl}acetate的产率得到tert-butyl {5-[2-cyclopentyl-1-(thiazol-2-ylcarbamoyl)ethyl]pyridin-2-ylsulfanyl}acetate