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Eleven New Triterpenes from Eurycorymbus cavaleriei

✍ Scribed by Lin Cheng; Li-Ming Shen; Min Zhang; Ning Li; Xian Li; Zhong-Jun Ma; Hai-Bin Qu

Publisher
John Wiley and Sons
Year
2010
Tongue
German
Weight
371 KB
Volume
93
Category
Article
ISSN
0018-019X

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✦ Synopsis

Abstract

Eleven new triterpenes, cavalerols A–K (1–11, resp.), ten of which were derivatives of hopane and one was derivative of dammarane, were isolated from the twigs of Eurycorymbus cavaleriei. Their structures were elucidated by spectroscopic methods including 2D‐NMR analysis. Cavalerol D (4) and cavalerol F (6), cavalerol B (2), and cavalerol G (7) were two pairs of isomers, and silver ion was introduced for their differentiation by multi‐stage tandem mass spectrometry. And nine compounds, except 5 and 10, were tested for quinone reductase (QR) induction activities in vitro, and results showed that compounds 2, 4, and 7 exhibited moderate induction activities with CD values of 8.62, 9.13, and 2.56β€…ΞΌg/ml, respectively, and compounds 6 and 8 showed cytotoxicity against hepa 1c1c7 cell line with IC~50~ values of no more than 1β€…ΞΌg/ml.

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