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