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alpha l arabinofuranosyl/kanker
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[Anti-tumor constituents from Paris polyphylla var. yunnanensis].
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OBJECTIVE
To study the anti-tumor active constituents from the rhizome of Paris polyphylla var. yunnanensis.
METHODS
The compounds were isolated by column chromatography with silica gel, and purified by Sephadex LH-20 columu chromafography and reverse-phase preparative, HPLC. The structures were
Experiments to increase the selectivity of tumor chemotherapy by means of in vivo activation of transport forms of cancerostatics by exogenous enzymes.
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A significant tumor damaging effect (growth inhibition) on transplanted syngeneic sarcoma in mouse was obtained by means of pH-dependent activation of a transport form of a cancerostatic drug by an enzyme foreign to the organism. This effect was achieved by combined administration of
Characterization of a water-soluble polysaccharide from Boletus edulis and its antitumor and immunomodulatory activities on renal cancer in mice.
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A polysaccharide (BEP, Mw=113,432Da) was purified from Boletus edulis, which had a backbone consisting of (1→6)-linked-α-d-glucopyranosyl, (1→2,6)-linked-α-d-galactopyranosyl, (1→6)-linked-α-d-galactopyranosyl, and (1→3)-linked-α-d-rhamnopyranosyl residues, which were branched at O-2 position of
Two diastereomeric saponins with cytotoxic activity from Albizia julibrissin.
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Two diastereomeric saponins, julibrosides J1 (1) and J9 (2), both of which show cytotoxic activity, were obtained from the stem bark of Albizia julibrissin Durazz. On the basis of chemical and spectral evidence [L.B. Ma et al., Carbohydr. Res., 281 (1996) 35-46], the structure of 1 was revised as
Pro-apoptotic activity of new triterpenoid saponins from the roots of Albizia adianthifolia (Schumach.) W.Wight.
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As part of our study of the proapoptotic function of saponins from Cameroonian's Albizia genus, phytochemical investigation of the roots of Albizia adianthifolia led to the isolation of three new triterpenoid saponins, named adianthifoliosides GI (13). Their structures were established on the basis
Five new cytotoxic triterpenoid saponins from the roots of Symplocos chinensis.
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Five new triterpenoid saponins, named symplocososides G-K, were isolated from the roots of Symplocos chinensis. Their structures were elucidated by spectral and chemical methods as symplocososide G, 3beta-O-{[beta-
Chemical constituents and biological activities of Dianthus elegans var. elegans.
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Chemical investigation of the aerial parts of Dianthus elegans var. elegans afforded two previously undescribed saponins, named dianosides M-N (1-2), together with four oleanane-type triterpenoid glycosides (3-6). Their structures were elucidated as
Cytotoxic saponins from the seeds of Pittosporum angustifolium.
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Three new acylated R1-barrigenol triterpene glycosides, 1-3, were isolated from the seeds of Pittosporum angustifolium Lodd. together with four known glycosides, 4-7, containing R1- and A1-barrigenol backbones. On the basis of spectroscopic, spectrometric, and chemical analyses the novel compounds
New triterpenoid estersaponins from the root barks of Pittosporum verticillatum subsp. verticillatum and evaluation of cytotoxicities.
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The phytochemical investigation of the root barks of Pittosporum verticillatum Bojer subsp. verticillatum led to the isolation of three new triterpene saponins,
Lebbeckoside C, a new triterpenoid saponin from the stem barks of Albizia lebbeck inhibits the growth of human glioblastoma cells.
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One new acacic acid-type saponin, named lebbeckoside C (1), was isolated from the stem barks of Albizia lebbeck. Its structure was established on the basis of extensive analysis of 1D and 2D NMR (1H, 13C NMR, DEPT, COSY, TOCSY, ROESY, HSQC and HMBC) experiments, HRESIMS studies, and by chemical
Inhibitory effects of flavonol glycosides from Cinnamomum osmophloeum on inflammatory mediators in LPS/IFN-gamma-activated murine macrophages.
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Four kaempferol glycosides were isolated from the leaves of Cinnamomum osmophloeum Kaneh, a Taiwan endemic tree. These compounds namely, kaempferitrin (1), kaempferol 3-O-beta-D-glucopyranosyl-(1-->4)-alpha-L-rhamnopyranosyl-7-O-alpha-L-rhamnopyranoside (2), kaempferol
Fatty acid synthase inhibitors from the hulls of Nephelium lappaceum L.
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Natural products inhibiting fatty acid synthase (FAS) are appearing as potential therapeutic agents to treat cancer and obesity. The bioassay-guided chemical investigation of the hulls of Nephelium lappaceum L. resulted in the isolation of ten compounds (1-10) mainly including flavonoids and
[Separation and identification of active constituents of Paris vietnamensis].
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OBJECTIVE
To study the anti-tumor bioactive steroid saponins of Paris vietnamensis (Takht.).
METHODS
The constituents were isolated and purified by chromatography and their structures were identified by spectral analysis and physicochemical properties. The cytotoxic bioactivities of the constituents
Oleanane type glycosides from Paronychia anatolica subsp. balansae.
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Four new oleanane-type triterpene glycosides were isolated from the methanol extract of the roots of Paronychia anatolica subsp. balansae along with three known oleanane-type triterpene glycosides. Structures of the new compounds were established as
A new triterpene saponin from Pittosporum viridiflorum from the Madagascar rainforest.
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A novel triterpenoid saponin, pittoviridoside (1), which possesses an unusual 2,3,4-trisubstituted glycosidic linkage, has been isolated from Pittosporum viridiflorum using the engineered yeast strains 1138, 1140, 1353, and Sc-7 for bioactivity-guided fractionation. The structure of this compound
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