6-(Difluoromethyl)-3-hydroxy-2-(trifluoromethoxy)pyridine-4-carboxaldehyde
2-(Difluoromethyl)-4-hydroxy-3-(trifluoromethoxy)pyridine-6-carboxaldehyde
3-(Difluoromethyl)-6-hydroxy-2-(trifluoromethoxy)pyridine-5-methanol
4-(Difluoromethyl)-2-hydroxy-6-(trifluoromethoxy)pyridine-3-methanol