3-Pyridinecarboxylic acid, 6-(difluoromethyl)-4-ethyl-5-isocyanato-2-(trifluoromethyl)-,ethyl ester 、
叠氮基三甲基硅烷 以2.20 g (49%)的产率得到3-Pyridinecarboxylic acid, 6-(difluoromethyl)-4-ethyl-5-(4,5-dihydro-5-oxo-1H-tetrazol-1-yl)-2-(trifluoromethyl)-,ethyl ester