Methyl 4-fluoro-2-methoxy-3-(trifluoromethoxy)pyridine-6-acetate
Methyl 3-fluoro-2-methoxy-5-(trifluoromethoxy)pyridine-4-carboxylate
Methyl 3-fluoro-5-methoxy-6-(trifluoromethoxy)pyridine-2-acetate
Methyl 6-fluoro-2-methoxy-3-(trifluoromethoxy)pyridine-4-carboxylate