4-Amino-3,5-dihydroxy-2-(trifluoromethoxy)pyridine
6-Amino-2,3-difluoro-4-(trifluoromethoxy)pyridine
3,4-Dichloro-6-iodo-2-(trifluoromethoxy)pyridine
2-Amino-4,5-dihydroxy-3-(trifluoromethoxy)pyridine
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