3-Hydroxy-2-nitro-4-(trifluoromethoxy)pyridine-6-sulfonamide
2-Bromo-3-(bromomethyl)-6-(trifluoromethoxy)-4-(trifluoromethyl)pyridine
3,4-Dichloro-6-(difluoromethyl)pyridine-2-sulfonamide
4-(Chloromethyl)-6-(difluoromethyl)-3-(trifluoromethoxy)pyridine-2-sulfonamide