Ethyl 2-hydroxy-6-nitro-4-(trifluoromethoxy)pyridine-3-carboxylate
Methyl 3-hydroxy-2-methoxy-5-(trifluoromethoxy)pyridine-4-carboxylate
Ethyl 2-hydroxy-5-nitro-6-(trifluoromethoxy)pyridine-3-carboxylate
3-Hydroxy-2-methoxy-4-(trifluoromethoxy)pyridine-6-carboxaldehyde