5-Cyano-4-nitro-2-(trifluoromethoxy)pyridine-3-carboxylic acid
3-Fluoro-2-nitro-5-(trifluoromethoxy)pyridine-4-carboxaldehyde
4-Cyano-2-iodo-3-(trifluoromethoxy)pyridine-5-carboxylic acid
2-Fluoro-6-nitro-4-(trifluoromethoxy)pyridine-3-carboxaldehyde