1-{3-cyano-5-ethoxycarbonyl-6-[(2-ethoxy-2-oxoethyl)thio]pyridin-2-yl}piperidine-4-carboxylic acid 、
1-(2,4-二氯苯基)甲烷磺酰胺 以to give ethyl 5-cyano-6-(4-{[(2,4-dichlorobenzyl)sulfonyl]carbamoyl}piperidin-1-yl)-2-[(2-ethoxy-2-oxoethyl)thio]nicotinate的产率得到ethyl 5-cyano-6-(4-{[(2,4-dichlorobenzyl)sulfonyl]carbamoyl}piperidin-1-yl)-2-[(2-ethoxy-2-oxoethyl)thio]nicotinate