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Antitumor sesquiterpene lactones from Helenium microcephalum: Isolation of mexicanin-E and structural characterization of microhelenin-B and -C

โœ Scribed by Lee Kuo-Hsiung; Yasuhiro Imakura; Donald Sims; Andrew T. McPhail; Kay D. Onan


Book ID
107841875
Publisher
Elsevier Science
Year
1977
Tongue
English
Weight
315 KB
Volume
16
Category
Article
ISSN
0031-9422

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๐Ÿ“œ SIMILAR VOLUMES


Antitumor agents XVII: Structure and ste
โœ Kuo-Hsiung Lee; Yasuhiro Imakura; Donald Sims ๐Ÿ“‚ Article ๐Ÿ“… 1976 ๐Ÿ› John Wiley and Sons ๐ŸŒ English โš– 651 KB

Keyphrases 0 Antitumor agents, potential-microhelenin-A, isolated from Helenium microcephalum, NMR spectral identification 0 Microhelenin-A-potential antitumor agent, isolated from Helenium microcephalurn, NMR spectral identification 0 Helenium microcephalum-microhelenin-A, potential antitumor agent

Antitumor agents XXXVI: Structural eluci
โœ Yasuhiro Imakura; Kuo-Hsiung Lee; Donald Sims; Rong-Yang Wu; Iris H. Hall; Hiros ๐Ÿ“‚ Article ๐Ÿ“… 1980 ๐Ÿ› John Wiley and Sons ๐ŸŒ English โš– 649 KB

The antitumor sesquiterpene lactones microhelenins-A, B, and C, microlenin acetate, and plenolin were isolated from Helenium microcephalum. The structures and stereochemistry of these lactones were determined by physical methods as well as by chemical transformations and correlations. Microlenin ace

Structure and stereochemistry of mexican
โœ Alfonso Romo de Vivar; Guillermo Delgado ๐Ÿ“‚ Article ๐Ÿ“… 1985 ๐Ÿ› Elsevier Science ๐ŸŒ French โš– 210 KB

The structure and stereochemistry of mexicanin F, a novel dimeric nor-sesquiterpene lactone isolated from He&n&m mexicanum, have been stablish\_ ed from spectral and single-crystal X-ray analyses. Several years ago, one of us reported the physical constants of the mexicanins A, B,..., H which, in ad

Antitumor agents 171. Cytotoxicities of
โœ Toshihiro Fujioka; Yoshiki Kashiwada; Hikaru Okabe; Kunihide Mihashi; Kuo-Hsiung ๐Ÿ“‚ Article ๐Ÿ“… 1996 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 198 KB

Cytotoxicities for lobatosides B-E and actinostemmosides B-F, isolated from Actinostemma lobatum, were evaluated against a panel of ca 60 human cancer cell lines. Lobatosides B-E (1-4) were cytotoxic (GIs0 < 1 ร— 10 -4 M) against all tumor cell lines; 4 showed potent cytotoxicity especially against A