3,4-Dihydroxy-5-(trifluoromethoxy)pyridine-2-sulfonyl chloride
2,3-Dihydroxy-4-(trifluoromethoxy)pyridine-6-carboxylic acid
2,6-Dihydroxy-3-(trifluoromethoxy)pyridine-4-sulfonyl chloride
2,6-Dihydroxy-3-(trifluoromethoxy)pyridine-5-carboxaldehyde
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