3-Hydroxy-4-nitro-2-(trifluoromethoxy)pyridine-6-sulfonamide
3-Hydroxy-2-nitro-6-(trifluoromethoxy)pyridine-4-sulfonamide
Ethyl 4-(bromomethyl)-3-hydroxy-2-(trifluoromethoxy)pyridine-5-carboxylate
2-Hydroxy-6-nitro-5-(trifluoromethoxy)pyridine-3-sulfonamide