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