1-(3-cyano-5-(ethoxycarbonyl)-6-ethylpyridin-2-yl)azetidine-3-carboxylic acid 、 (4-Fluoro-3-methylphenyl)methanesulfonamide 以to give ethyl 5-cyano-2-ethyl-6-(3-{[(4-fluoro-3-methylbenzyl)sulfonyl]carbamoyl}azetidin-1-yl)nicotinate的产率得到ethyl 5-cyano-2-ethyl-6-(3-{[(4-fluoro-3-methylbenzyl)sulfonyl]carbamoyl}azetidin-1-yl)nicotinate