The hypothesis of tautomeric equilibrium between epimers in ciquitins A and B

Peng Zhao, Xiao-Xiao Huang & Shao-Jiang Song
Recently, ciquitins A and B isolated from the powdered and defatted airdried aerial parts of Leucophyllum ambiguum were reported as a mixture of conformers in a solution at room temperature. Considering the existence of a hemiacetal hydroxyl fragment in the ciquitins A and B, they are more likely to exist in the form of epimer rather than the mixture of conformers. To confirm this hypothesis, the NMR calculations of two epimers at C-9 (1-a and...
1 citation reported since publication in 2021.
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