3-Hydroxy-2-nitro-5-(trifluoromethoxy)pyridine-6-carboxaldehyde
3-Hydroxy-2-nitro-4-(trifluoromethoxy)pyridine-5-carboxaldehyde
2-Fluoro-6-methyl-3-(trifluoromethoxy)pyridine-4-sulfonamide
6-Hydroxy-2-nitro-4-(trifluoromethoxy)pyridine-3-carboxaldehyde