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Two new steroidal saponins from the rhizomes of Dioscorea panthaica and their cytotoxic activity.
Two new steroidal saponins, dioscoresides C and D, along with a new natural product, pregnadienolone 3-O-beta-gracillimatriose, and two known compounds were isolated from the rhizomes of Dioscorea panthaica Prain et Burkill.
Steroidal saponins from Dioscorea panthaica and their cytotoxic activity.
A new steroidal saponin, dioscoreside E, and a known compound, protodioscin, were isolated from an ethanol extract of the rhizomes of Dioscorea panthaica and showed cytotoxic activity against a panel of tumor cell lines.
[Chemical investigation of genus Hedyotis. II. Isolation and identification of iridoids from Hedyotis chrysotricha].
- J. Peng, X. Feng, G. Y. Li, X. Liang
- ChemistryYao xue xue bao = Acta pharmaceutica Sinica
- 1 December 1997
From the alcoholic extract of the whole plant of H. chrysotricha, ten iridoids were isolated and their structures were elucidated as hedyoside and 6'-acetylasperuloside, two new compounds of genus Hedyotis used as folk medicine for treatment of cold, inflammation, cancer and etc.
Three New Triterpenoids from Fuscoporia Obliqua
Three new lanostane triterpenoids were isolated from the petroleum ether extracts of Fuscoporia obliqua and their structures have been determined on the basis of chemical, spectroscopic methods and X-ray crystallographic analysis.
Feigrisolides A, B, C and D, new lactones with antibacterial activities from Streptomyces griseus.
- Y. Tang, I. Sattler, R. Thiericke, S. Grabley, X. Feng
- Chemistry, BiologyThe Journal of antibiotics
- 25 September 2000
Four new lactone compounds, named feigrisolides A to D (1 to 4), have been isolated from Streptomyces griseus by detail analysis of their spectroscopic data and chemical transformations.
[Monomeric Indole Alkaloids from Kopsia officinalis.].
Ten monomeric indole alkaloids have been identified from the roots of KOPSIA OFFICINALIS. Four of them are known: (-)-kopsinine 1, (+)-5,22-dioxokopsane 2, (-)-tetrahydroalstonine 4, and…
New 1-O-acyl alpha-L-rhamnopyranosides and rhamnosylated lactones from Streptomyces sp., inhibitors of 3 alpha-hydroxysteroid-dehydrogenase (3alpha-HSD).
The rhamnosyltransferase of the Streptomyces strain is able to connect the sugar moiety to heteroaromatic carboxylic acids and enols and inhibit the enzyme 3alpha-hydroxysteroid-dehydrogenase (3alpha-HSD).
Chemical constituents of Armillaria mellea mycelium. I. Isolation and characterization of armillarin and armillaridin.
Two new sesquiterpenoid aromatic esters, armillarin and armillaridin, have been isolated from the artificially cultured mycelium of ARMILLARIA MELLEA (Vahl. ex Fr.) Quel. (Tricholometaceae). On the…
Phenylpropanes from Acorus tatarinowii.
In addition to a number of known compounds, four new phenylpropanes isoacoramone, (cis) epoxyasarone, (threo) 1',2'-dihydroxyasarone and (erythro) 1',2'-dihydroxyasarone were obtained from the roots…