Ethyl 2-cyano-3-nitro-6-(trifluoromethoxy)pyridine-4-carboxylate
2-Chloro-4-nitro-3-(trifluoromethoxy)pyridine-5-sulfonyl chloride
Methyl 4-cyano-3-nitro-6-(trifluoromethoxy)pyridine-2-carboxylate
6-Cyano-3-nitro-2-(trifluoromethoxy)pyridine-4-carboxylic acid