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