Abstract
Sixteen triterpenoid saponins (1-16) were isolated from the stems of Clematis parviloba, including a new compound, parvilobaside A (1), which was established as 23-O-acetyl-hederagenin-3-O-beta-D-ribopyranosyl-(1 --> 3)-alpha-L-rhamnopyranosyl-(1 --> 2)-alpha-l-arabinopyranoside on the basis of various spectroscopic techniques and chemical evidences. Among the isolated compounds, clematoside S (2) and alpha-hederin (4) showed moderate cytotoxic activities against four human tumor cell lines (HCT-8, Bel-7402, BGC-823, and A-2780) with IC(50) values in the range of 1.44-6.86 microg/ml.
MeSH terms
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Antineoplastic Agents, Phytogenic / chemistry
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Antineoplastic Agents, Phytogenic / isolation & purification*
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Antineoplastic Agents, Phytogenic / pharmacology
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Clematis / chemistry*
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Drug Screening Assays, Antitumor
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Drugs, Chinese Herbal / chemistry
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Drugs, Chinese Herbal / isolation & purification*
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Drugs, Chinese Herbal / pharmacology
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Humans
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Inhibitory Concentration 50
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Molecular Structure
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Oleanolic Acid / analogs & derivatives*
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Oleanolic Acid / chemistry
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Oleanolic Acid / isolation & purification*
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Oleanolic Acid / pharmacology
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Plant Stems / chemistry
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Plants, Medicinal / chemistry*
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Saponins / chemistry
Substances
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Antineoplastic Agents, Phytogenic
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Drugs, Chinese Herbal
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Saponins
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parvilobaside A
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Oleanolic Acid