4-[[(2,4-dimethylpyridin-3-yl)carbonyl]amino]-N-[[1-[4-(methylsulfonyl)butyl]cyclopentyl]thioxomethyl]-L-phenylalanine methyl ester 在
sodium hydroxide 作用下,
以
乙醇 为溶剂,
以54.5 mg (82%)的产率得到4-[[(2,4-dimethylpyridin-3-yl)carbonyl]amino]-N-[[1-[4-(methylsulfonyl)butyl]-cyclopentyl]thioxomethyl]-L-phenylalanine trifluoroacetic acid salt