6-chloro-2-(5-formyl-pyridin-3-yl)-1-methyl-1H-indole-3-carbonitrile 、
(s)-(-)-N-叔丁氧羰基-3-氨基吡咯烷 以to give (S)-3-{[5-(6-chloro-3-cyano-1-methyl-1H-indol-2-yl)-pyridin-3-ylmethyl]-amino}-pyrrolidine-1-carboxylic acid tert-butyl ester的产率得到(S)-3-{[5-(6-chloro-3-cyano-1-methyl-1H-indol-2-yl)-pyridin-3-ylmethyl]-amino}-pyrrolidine-1-carboxylic acid tert-butyl ester