Potential anti-allergic ent-kaurene diterpenes from the bark of Suregada multiflora

  • Phytochemistry. 2006 Dec;67(24):2630-4. doi: 10.1016/j.phytochem.2006.09.031.
Sarot Cheenpracha  1 ,  Orapun Yodsaoue ,  Chatchanok Karalai ,  Chanita Ponglimanont ,  Sanan Subhadhirasakul ,  Supinya Tewtrakul ,  Akkharawit Kanjana-opas
Affiliations
  • 1. Department of Chemistry, Faculty of Science, Prince of Songkla University, Hat-Yai, Songkhla 90112, Thailand.
PMID: 17095024 DOI: 10.1016/j.phytochem.2006.09.031
Abstract

Two ent-kaurene diterpenes, ent-16-kaurene-3beta,15beta,18-triol (1) and ent-3-oxo-16-kaurene-15beta,18-diol (2), were isolated from a dichloromethane extract of the bark of Suregada multiflora along with five known diterpenes:ent-16-kaurene-3beta,15beta-diol (3), abbeokutone (4), helioscopinolide A (5), helioscopinolide C (6) and helioscopinolide I (7). Their structures were elucidated on the basis of spectroscopic analysis. Compounds 1-7 possessed appreciable anti-allergic activities in RBL-2H3 cells model with IC50 values ranging from 22.5 to 42.2 microM.

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