4-Cyano-3-(difluoromethyl)-2-(trifluoromethoxy)pyridine-5-acetic acid
2-Cyano-5-nitro-6-(trifluoromethoxy)pyridine-3-acetic acid
2-(Aminomethyl)-6-cyano-4-(trifluoromethoxy)pyridine-3-carboxylic acid
6-Cyano-4-nitro-2-(trifluoromethoxy)pyridine-3-acetic acid