4-Fluoro-2-(difluoromethyl)-6-hydroxy-3-(trifluoromethoxy)pyridine
3-Fluoro-4-(difluoromethyl)-6-hydroxy-2-(trifluoromethoxy)pyridine
3-Fluoro-6-hydroxy-2-(trifluoromethoxy)pyridine-5-acetonitrile
5-Fluoro-2-hydroxy-3-(trifluoromethoxy)pyridine-6-acetonitrile