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.
Publication types
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Research Support, Non-U.S. Gov't
MeSH terms
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Animals
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Anti-Allergic Agents / chemistry*
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Anti-Allergic Agents / isolation & purification
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Anti-Allergic Agents / pharmacology
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Cell Line, Tumor
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Diterpenes, Kaurane / chemistry*
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Diterpenes, Kaurane / isolation & purification
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Diterpenes, Kaurane / pharmacology
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Magnetic Resonance Spectroscopy
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Molecular Structure
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Plant Bark / chemistry*
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Plant Extracts / chemistry
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Plant Extracts / isolation & purification
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Plant Extracts / pharmacology
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Suregada / chemistry*
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beta-N-Acetylhexosaminidases / antagonists & inhibitors
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beta-N-Acetylhexosaminidases / metabolism
Substances
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Anti-Allergic Agents
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Diterpenes, Kaurane
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Plant Extracts
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beta-N-Acetylhexosaminidases