2-(Chloromethyl)-5-(difluoromethyl)-3-(trifluoromethoxy)pyridine-4-sulfonyl chloride
5-(Aminomethyl)-2-cyano-4-(difluoromethyl)pyridine
2-(Difluoromethyl)-3-iodopyridine-6-sulfonyl chloride
6-(Chloromethyl)-4-(difluoromethyl)-3-(trifluoromethoxy)pyridine-2-sulfonyl chloride