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Two new triterpenoids, teuviscins A (1) and B (2), were isolated from the whole plants of Teucrium viscidum. Compound 1 possessed a rare 7(8→9)abeo-9R-D:C-friedo-B′:A′-neo-gammacerane skeleton, and compound 2 is a… Click to show full abstract
Two new triterpenoids, teuviscins A (1) and B (2), were isolated from the whole plants of Teucrium viscidum. Compound 1 possessed a rare 7(8→9)abeo-9R-D:C-friedo-B′:A′-neo-gammacerane skeleton, and compound 2 is a taraxerane triterpene acid. Their structures were characterized by extensive spectroscopic methods (HR-ESI-MS, 1D and 2D NMR), and the absolute configurations of 1 and 2 were secured by single-crystal X-ray diffraction analyses using Cu Kα radiation. Compound 2 showed anti-AD bioactivity which delayed animals paralysis of transgenic AD Caenorhabditis elegans.
Journal Title: Organic chemistry frontiers
Year Published: 2017
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