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