Methyl 2,5-dihydroxy-3-(trifluoromethoxy)pyridine-4-acetate
Methyl 2,5-dimethyl-3-(trifluoromethoxy)pyridine-6-acetate
Methyl 4,6-dimethyl-2-(trifluoromethoxy)pyridine-3-acetate
Methyl 4,6-dimethyl-3-(trifluoromethoxy)pyridine-2-acetate
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