3-Cyano-4-nitro-2-(trifluoromethoxy)pyridine-6-sulfonyl chloride
4-(Bromomethyl)-3-cyano-6-methoxy-2-(trifluoromethoxy)pyridine
3-Cyano-2-nitro-6-(trifluoromethoxy)pyridine-4-sulfonyl chloride
3-Fluoro-2-nitro-6-(trifluoromethoxy)pyridine-5-acetic acid