3-(Difluoromethyl)-2-nitro-4-(trifluoromethyl)pyridine-6-sulfonamide
6-(Difluoromethyl)-2-nitro-4-(trifluoromethyl)pyridine-3-sulfonamide
2-(Difluoromethyl)-6-nitro-3-(trifluoromethyl)pyridine-5-sulfonamide
2-(Difluoromethyl)-5-nitro-6-(trifluoromethyl)pyridine-3-sulfonamide