3-(Difluoromethyl)-5-hydroxy-6-(trifluoromethoxy)pyridine-2-acetonitrile
2-(Difluoromethyl)-4-hydroxy-3-(trifluoromethoxy)pyridine-6-carboxylic acid
2-(Difluoromethyl)-3-hydroxy-6-(trifluoromethoxy)pyridine-4-carboxylic acid
2-Hydroxy-6-iodo-3-(trifluoromethoxy)pyridine-5-acetic acid