4,6-Dihydroxy-2-(trifluoromethoxy)pyridine-3-acetic acid
3,4-Dihydroxy-2-iodo-5-(trifluoromethoxy)pyridine
2,4-Dihydroxy-5-(trifluoromethoxy)pyridine-3-acetic acid
2,6-Dihydroxy-3-iodo-4-(trifluoromethoxy)pyridine
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