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