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  • Title: [Bioactive isomalabaricane triterpenes isolated from marine sponge Rhabdastrella aff. distincta].
    Author: Lu F, Lin WH.
    Journal: Zhongguo Zhong Yao Za Zhi; 2006 Jun; 31(11):894-8. PubMed ID: 17048627.
    Abstract:
    OBJECTIVE: To study the chemical constituents of the marine sponge Rhabdastrella aff. distincta. METHOD: Compounds were obtained by normal phase silica gel, Sephadex LH-20, reverse phase chromatogrophy and methylation method. These structures were determined on the basis of IR, MS, NMR spectral analysis. RESULT: Eight compounds were isolated from bioactive CH3Cl fraction and identified as geoditin A (1), geoditin B (2), stellettin A (5), stellettin B (4), stellettin C (3), stellettinE (7), rhabdastrellic acid A (8) and the methyl ester of stellettin E (6). CONCLUSION: All these compounds were obtained from this species for the first time.
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