(2S,4R)-4-[(5-chloro-thiophene-2-carbonyl)-amino]-1-([2-fluoro-4-(2-oxo-pyridin-1-yl)-phenylcarbamoyl]-methyl)-pyrrolidine-2-carboxylic acid 、
C.I.酸性橙108 以to give (2S,4R)-4-[(5-chloro-thiophene-2-carbonyl)-amino]-1-{[2-fluoro-4-(2-oxo-pyridin-1-yl)-phenylcarbamoyl]-methyl}-pyrrolidine-2-carboxylic acid (2-hydroxy-ethyl)-amide的产率得到(2S,4R)-4-[(5-chloro-thiophene-2-carbonyl)-amino]-1-{[2-fluoro-4-(2-oxo-pyridin-1-yl)-phenylcarbamoyl]-methyl}-pyrrolidine-2-carboxylic acid (2-hydroxy-ethyl)-amide