alexa Eleven new highly oxygenated triterpenoids from the leaves and stems of Schisandra chinensis.
Genetics & Molecular Biology

Genetics & Molecular Biology

Journal of Molecular and Genetic Medicine

Author(s): Song QY, Jiang K, Zhao QQ, Gao K, Jin XJ,

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Abstract Eleven new triterpenoids, schinchinenins A–H (1–8) and schinchinenlactones A–C (9–11) together with three known triterpenoids, henrischinins A–C (12–14), were isolated from the leaves and stems of Schisandra chinensis by bioassay-guided fractionation. Schinchinenin A (1) is the first example of a highly oxygenated triterpenoid characterized by a 5/5/7/6/5-fused pentacyclic ring and a 3-one-2-oxabicyclo[3.2.1]-octane moiety. Schinchinenins E and F (5 and 6) are highly oxygenated triterpenoids that contain a hydroperoxyl moiety, which is rare in compounds from the Schisandra genus. The structures and stereochemistry of 1–11 were elucidated using spectroscopic analysis, single-crystal X-ray diffraction, computational optical rotation, chemical transformation, and CD exciton chirality methods. The activities of compounds 1, 2, 7, and 12–14 against HSV-2 and adenovirus were evaluated for the first time, and of these compounds, 13 was the most active inhibitor of HSV-2, with a selectivity index value as high as 29.95. This article was published in Org Biomol Chem and referenced in Journal of Molecular and Genetic Medicine

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