3-Hydroxy-4-(trifluoromethoxy)-5-(trifluoromethyl)pyridine-2-carboxylic acid
2-(Difluoromethyl)-5-hydroxy-4-(trifluoromethoxy)pyridine-3-methanol
4-(Difluoromethyl)-3-hydroxy-5-(trifluoromethoxy)pyridine-2-acetonitrile
5-(Difluoromethyl)-3-hydroxy-2-(trifluoromethoxy)pyridine-4-acetonitrile