3-Cyano-2-(difluoromethyl)-4-(trifluoromethoxy)pyridine-6-acetic acid
4-(Difluoromethyl)-2-fluoro-3-(trifluoromethoxy)pyridine-6-carboxylic acid
5-Hydroxy-3-iodo-2-(trifluoromethoxy)pyridine-4-acetic acid
2-Cyano-6-(difluoromethyl)-5-(trifluoromethoxy)pyridine-3-acetic acid