1-{3-cyano-5-(ethoxycarbonyl)-6-[(2-oxo-pyrrolidin-1-yl)methyl]pyridin-2-yl}piperidine-4-carboxylic acid 、
cyclobutyl carbinylsulfonamide 以to give ethyl 5-cyano-6-(4-{[(cyclobutylmethyl)sulfonyl]carbamoyl}piperidin-1-yl)-2-[(2-oxopyrrolidin-1-yl)methyl]nicotinate的产率得到ethyl 5-cyano-6-(4-{[(cyclobutylmethyl)sulfonyl]carbamoyl}piperidin-1-yl)-2-[(2-oxopyrrolidin-1-yl)methyl]nicotinate