5-Cyano-2-nitro-3-(trifluoromethoxy)pyridine-6-carboxylic acid
4-(Aminomethyl)-5-cyano-2-(trifluoromethoxy)pyridine-3-acetonitrile
4-Cyano-3-nitro-6-(trifluoromethoxy)pyridine-2-carboxylic acid
6-(Difluoromethyl)-2-fluoro-4-(trifluoromethoxy)pyridine-3-carboxylic acid