3-(Chloromethyl)-2-(difluoromethyl)-4-(trifluoromethoxy)pyridine-6-sulfonyl chloride
2-(Chloromethyl)-6-(difluoromethyl)-5-(trifluoromethoxy)pyridine-3-sulfonyl chloride
2-(Chloromethyl)-6-(difluoromethyl)-3-(trifluoromethoxy)pyridine-5-sulfonyl chloride
6-(Chloromethyl)-3-(difluoromethyl)-2-(trifluoromethoxy)pyridine-4-sulfonyl chloride