3-Bromo-4,6-dihydroxy-2-(trifluoromethoxy)pyridine
4-Chloro-2,6-dihydroxy-3-(trifluoromethoxy)pyridine
3-Amino-2,4-dihydroxy-5-(trifluoromethoxy)pyridine
2-Chloro-3,6-dihydroxy-5-(trifluoromethoxy)pyridine
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