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