Bioactive triterpenoids from twigs of Betula schmidtii.

Published on Apr 1, 2018in Bioorganic Chemistry4.831
· DOI :10.1016/J.BIOORG.2018.02.006
Kyoung Jin Park12
Estimated H-index: 12
(SKKU: Sungkyunkwan University),
Lalita Subedi16
Estimated H-index: 16
(Gachon University)
+ 2 AuthorsKang Ro Lee37
Estimated H-index: 37
(SKKU: Sungkyunkwan University)
Abstract Investigation of the MeOH extract of Betula schmidtii twigs resulted in the isolation and identification of three new triterpenoids (1–3), along with ten known ones (4–13). The structures of new compounds (1–3) were elucidated by spectroscopic methods, including 1D, 2D NMR (1H and 13C NMR, COSY, HSQC, HMBC, and NOESY), HR-MS, and chemical methods. All the isolated compounds were evaluated for their cytotoxicity against A549, SK-OV-3, SK-MEL-2, and HCT-15 cell lines. Compound 11 exhibited potent cytotoxic activities against four cell lines, and compounds 5 and 13 significantly induced nerve growth factor secretion in a C6 rat glioma cell line. Their anti-inflammatory effects were also assessed by measuring nitric oxide production in lipopolysaccharide–activated BV-2 cells. Compounds 7 and 12 displayed potent inhibition of nitric oxide production, without significant cell toxicity.
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