3-Cyano-2-nitro-5-(trifluoromethoxy)pyridine-4-carboxylic acid
2-Cyano-6-fluoro-5-methyl-3-(trifluoromethoxy)pyridine
3-(Aminomethyl)-2-chloro-4-(trifluoromethoxy)pyridine-5-carboxylic acid
6-Cyano-2-nitro-3-(trifluoromethoxy)pyridine-4-carboxylic acid