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