2-(Bromomethyl)-3-(difluoromethyl)-6-(trifluoromethoxy)pyridine-5-sulfonamide
2-(Chloromethyl)-3-(difluoromethyl)-6-(trifluoromethoxy)pyridine-5-sulfonamide
2-(Bromomethyl)-3-(difluoromethyl)-5-(trifluoromethoxy)pyridine-4-sulfonamide
4-(Difluoromethyl)-5-methoxy-3-nitropyridine-2-sulfonamide