2-Cyano-4-nitro-5-(trifluoromethoxy)pyridine-3-carboxylic acid
2-Chloro-6-nitro-3-(trifluoromethoxy)pyridine-4-sulfonyl chloride
6-Chloro-3-nitro-4-(trifluoromethoxy)pyridine-2-sulfonamide
2-Chloro-5-nitro-3-(trifluoromethoxy)pyridine-4-sulfonyl chloride