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