Ethyl 4,5-dihydroxy-2-(trifluoromethoxy)pyridine-3-carboxylate
2-Methyl-6-(trifluoromethoxy)pyridine-4-methanol
Ethyl 4,5-dihydroxy-3-(trifluoromethoxy)pyridine-2-carboxylate
3,4-Dihydroxy-5-fluoro-2-(trifluoromethoxy)pyridine
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