4-Hydroxy-2-nitro-3-(trifluoromethoxy)pyridine-5-carboxaldehyde
4-Iodo-2-methyl-6-(trifluoromethoxy)pyridine-3-carboxaldehyde
2-(Difluoromethyl)-3-hydroxy-6-(trifluoromethoxy)pyridine-5-methanol
5-Hydroxy-3-nitro-4-(trifluoromethoxy)pyridine-2-carboxaldehyde