4-(Difluoromethyl)-3-hydroxy-5-(trifluoromethyl)pyridine-2-acetonitrile
5-(Difluoromethyl)-4-hydroxy-2-(trifluoromethyl)pyridine-3-acetonitrile
2-(Chloromethyl)-5-(difluoromethyl)-4-hydroxypyridine-3-carboxaldehyde
5-(Bromomethyl)-4-(difluoromethyl)-2-hydroxypyridine-3-acetonitrile