5-(Chloromethyl)-4-(difluoromethyl)-2-(trifluoromethoxy)pyridine-3-sulfonamide
4-Bromo-5-(difluoromethyl)pyridine-2-sulfonamide
4-Bromo-2-(difluoromethyl)pyridine-6-sulfonamide
6-(Chloromethyl)-2-(difluoromethyl)-4-(trifluoromethoxy)pyridine-3-sulfonamide