4,5-dibromo-thiophene-2-carboxylic acid ((S)-1-pyrrolidin-3-ylmethyl)-amide trifluoroacetate 、
[2-fluoro-4-(2-oxo-2H-pyridin-1-yl)-phenyl]-carbamic acid 4-nitro-phenyl ester 以to give (R)-3-{[(4,5-dibromo-thiophene-2-carbonyl)-amino]-methyl}-pyrrolidine-1-carboxylic acid[2-fluoro-4-(2-oxo-2H-pyridin-1-yl)-phenyl]-amide的产率得到(R)-3-{[(4,5-dibromo-thiophene-2-carbonyl)-amino]-methyl}-pyrrolidine-1-carboxylic acid[2-fluoro-4-(2-oxo-2H-pyridin-1-yl)-phenyl]-amide