2,3-Dihydroxy-6-(trifluoromethoxy)pyridine-5-carboxaldehyde
6-(Difluoromethyl)-2-methyl-4-(trifluoromethoxy)pyridine-3-methanol
2,3-Dihydroxy-5-(trifluoromethoxy)pyridine-4-carboxaldehyde
6-(Difluoromethyl)-3-methyl-4-(trifluoromethoxy)pyridine-2-methanol