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