4,5-Dihydroxy-3-(trifluoromethoxy)pyridine-2-carboxylic acid
2,6-Difluoro-4-(difluoromethyl)-3-(trifluoromethoxy)pyridine
2,6-Dihydroxy-4-(trifluoromethoxy)pyridine-3-carboxylic acid
3,6-Difluoro-2-(difluoromethyl)-5-(trifluoromethoxy)pyridine
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