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