3-Cyano-2-(trifluoromethoxy)-5-(trifluoromethyl)pyridine-4-acetic acid
6-Cyano-2-(trifluoromethoxy)-3-(trifluoromethyl)pyridine-4-acetic acid
3-Cyano-4-fluoro-2-nitro-5-(trifluoromethoxy)pyridine
2-Cyano-6-(trifluoromethoxy)-4-(trifluoromethyl)pyridine-3-acetic acid