从加勒比海绵中提取的新的抗食性三萜苷

J. Kubanek, W. Fenical, J. Pawlik
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引用次数: 21

摘要

摘要从加勒比海绵中鉴定出两组抗食性三萜苷类化合物。采用核磁共振和质谱方法对已知戊甾醇四糖福尔摩苷的n -乙酰基氨基衍生物福尔摩苷B的结构进行了表征。四种三萜六糖和两种三萜三糖,其特征是一个31碳的苷元,很难分离,因此只确定了其苷元的结构。气相色谱分析从这些混合物衍生的糖确定了这些化合物的碳水化合物含量。所有分离的三萜苷都有助于这种海绵的化学防御,尽管它们的活性不同。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
New Antifeedant Triterpene Glycosides from the Caribbean Sponge Erylus Formosus
Abstract Two groups of antifeedant triterpene glycosides were identified from the Caribbean sponge Erylus formosus. The structure of formoside B, a novel N-acetyl amino derivative of the known penasterol tetrasaccharide formoside, was elucidated using NMR and mass spectral data. Four triterpene hexasaccharides and two triterpene trisaccharides, characterized by a 31-carbon aglycone, proved difficult to isolate and therefore only the structure of their aglycone was determined. Gas chromatographic analysis of derivatized saccharides from these mixtures established the carbohydrate content of these compounds. All of the triterpene glycosides isolated contributed to the chemical defenses of this sponge, although with differing activities.
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