3-Cyano-2-nitro-5-(trifluoromethoxy)pyridine-4-sulfonyl chloride
6-Cyano-2-nitro-3-(trifluoromethoxy)pyridine-4-sulfonyl chloride
2-Cyano-6-nitro-4-(trifluoromethoxy)pyridine-3-sulfonyl chloride
6-(Aminomethyl)-3-fluoro-2-hydroxy-4-(trifluoromethoxy)pyridine