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