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