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