3,5-Dihydroxy-4-(difluoromethyl)-2-(trifluoromethoxy)pyridine
4,5-Dihydroxy-2-(difluoromethyl)-3-(trifluoromethoxy)pyridine
4,5-Dihydroxy-3-(difluoromethyl)-2-(trifluoromethoxy)pyridine
2,5-Dichloro-4-(trifluoromethoxy)pyridine-3-sulfonyl chloride
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