Methyl 4-hydroxy-5-(trifluoromethoxy)pyridine-2-acetate
Methyl 5-fluoro-4-(trifluoromethoxy)pyridine-2-acetate
Methyl 4-hydroxy-3-(trifluoromethoxy)pyridine-2-acetate
Methyl 3-fluoro-4-(trifluoromethoxy)pyridine-2-acetate
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