2-(Difluoromethyl)-5-nitro-4-(trifluoromethoxy)pyridine-3-carbonyl chloride
6-(Difluoromethyl)-4-nitro-2-(trifluoromethoxy)pyridine-3-carbonyl chloride
2-(Difluoromethyl)-3-nitro-6-(trifluoromethoxy)pyridine-4-sulfonyl chloride
2-(Difluoromethyl)-3-nitro-4-(trifluoromethoxy)pyridine-6-sulfonyl chloride