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