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  • Title: Pregnane glycosides from Cynanchum atratum.
    Author: Bai H, Li W, Koike K.
    Journal: Steroids; 2008 Jan; 73(1):96-103. PubMed ID: 17981311.
    Abstract:
    Five new pregnane glycosides, cynanosides K-O (1-5) with a 14,15-seco-pregnane-type skeleton as the aglycon, together with five known compounds, cynascyroside C, sublanceoside E(1), sublanceoside I(1), atratoside A and atratoside B, were isolated from the roots of Cynanchum atratum. Their structures were determined on the basis of spectroscopic analysis and chemical evidence.
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