CJCU

Chem. J. Chinese Universities ›› 1993, Vol. 14 ›› Issue (2): 214.

• Articles • Previous Articles     Next Articles

Triterpenes from the Leaves of Pterospermum Lanceae folium Roxb

ZHONG Yong-Li1, SU Jing-Yu1, ZENG Long-Mei1, TU Guang-Zhong2, MA Li-Bin2, HONG Shao-Liang2   

  1. 1. Department of Chemistry, Zhongshan Utirersity, Guangzhou, 510275;
    2. Beijing Murochemical Institute
  • Received:1991-11-05 Revised:1992-11-16 Online:1993-02-24 Published:1993-02-24

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Abstract: Anew triterpene, sterculin-A (1), along with two known compounds, baurenyl acetate and β-sitosterol, were isolated from the ethyl acetate extracts of the leaves of P.lanicacfulunn Koxb.1 is the colorless needle crystal, C30H50O2, m.p.196-.197℃, [α]D25+15.2(MeOH, c 0.023), The structure of 1 was determined as cycloart-23Z-ene-3β, 25-diol on the basis of 1R, MS, 1H NMR, 13C NMR(DEPT), and COSYtechniques.The NMRspectra of 1 in CDCl3 was found changeable in several hours.Inspection of the changed NMRspectra reveals that a loss of a molecule of water has been occured due to the trace of acid contained in CDCl3.The structure of the product was assigned as cycloart-23E,25-dicne-3β-ol.

Key words: Peterospermum laaccae folium Rojxb, Sterculiaceae, Triterpene, Cycloart-23Z-ene-3β, 25-diol

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