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  • Title: Polyoxygenated ursane and oleanane triterpenes from Siphonodon celastrineus.
    Author: Kaweetripob W, Mahidol C, Thongnest S, Prawat H, Ruchirawat S.
    Journal: Phytochemistry; 2016 Sep; 129():58-67. PubMed ID: 27469098.
    Abstract:
    Twenty polyoxygenated triterpenes, including nineteen ursanes and one oleanane, were characterized from the stem material of Siphonodon celastrineus (Celastraceae) through the application of spectroscopic techniques and chemical transformation. Three of the ursane-type triterpenoids possessed the rare 13,27-cyclopropane ring skeleton.
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