Results 131 to 140 of about 42,724 (181)

Xanthones of Comastoma pedunlulatum

China Journal of Chinese Materia Medica, 2010
The xanthones in the ethyl acetate extract of Comastoma pedunlulatum were investigated. The chromatographic and spectroscopic techniques were used to isolate and identify the constituents. Nine xanthones were isolated from the active parts of the ethyl acetate portion of the 70% ethanolic extract of C.
Yi, Yuan, Baosong, Cui, Ying, Zhang, Shuai, Li   +3 more
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Xanthone: A Promising Antimycobacterial Scaffold

Medicinal Chemistry, 2021
Background: Tuberculosis (TB) is one of the infectious diseases associated with high rate of morbidity and mortality and still remains one of the top-ten leading causes of human death in the world. The development of new anti-TB drugs is mandatory due to the existence of latent infection as well as the expansion of the resistant Mycobacterium ...
Tilal, Elsaman, Malik Suliman, Mohamed, Eyman Mohamed, Eltayib, Abualgasim Elgaili, Abdalla, Magdi Awadalla, Mohamed   +4 more
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Xanthone Analogue of Geiparvarin

Archiv der Pharmazie, 1985
AbstractThe synthesis and the pharmacological properties of the xanthone analogue of geiparvarin, a naturally occurring antitumor coumarin, are described.
P, Valenti, M, Recanatini, P, Da Re, W, Galimbeni, N, Avanzi, S, Filippeschi   +5 more
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Novel xanthones from Garcinia mangostana, structures of BR-xanthone-A and BR-xanthone-B

Phytochemistry, 1988
Abstract The chemical examination of the dry fruit hulls of Garcinia mangostana yielded, in addition to known xanthones, two new xanthones, a bis-pyrano xanthone, BR. xanthone- A and 1-methoxy-2,4,5-trihydroxyxanthone, BR-xanthone-B. Evidence of their structures is presented.
Krishnamoorthi Balasubramanian, Krishnamoorthi Rajagopalan   +1 more
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Secoiridoids and Xanthones in the Genus Centaurium

Planta Medica, 1981
Overground parts of Centaurium spicatum (L.) Fritsch (Gentianaceae) from two different habitats have been investigated on their content of Secoiridoid glucosides. Sweroside (I), Swertiamarin (II) and gentiopicrin (III) (= gentiopicroside) have been identified. In plant material of C. spicatum from both habitats sweroside is the major compound. In plant
W G, van der Sluis, R P, Labadie
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Allylamine Type Xanthone Antimycotics

Archiv der Pharmazie, 1998
A number of xanthone derivatives bearing the basic chain of naftifine and butenafine antimycotics in 1, 2, 3, and 4 nuclear positions are described. The in vitro antifungal activity against representative strains of molds and yeasts is reported. Only butenafine xanthone analogues show significant activity against Cryptococcus neoformans, in particular ...
I. SALMOIRAGHI, ROSSI, Maddalena, P. VALENTI, P. DA RE   +3 more
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Structure of xanthone

Acta Crystallographica Section C Crystal Structure Communications, 1990
C 13 H 8 O 2 cristallise dans P2 1 2 1 2 1 avec a=14,072, b=13,627, c=4,878A, Z=4 ; affinement jusqu'a R=0,077. La molecule est plane sauf pour l'atome O du carbonyl (0,13A hors du plan). Les cycles benzene ne sont pas des hexagones reguliers mais la distorsion est symetrique et la molecule a la symetrie C 2v approximative. Il n'y a pas de distances
S. Onuma, K. Iijima, I. Oonishi
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A New Regiospecific Preparation of Xanthones

Organic Letters, 2003
AbstractFor Abstract see ChemInform Abstract in Full Text.
Frank M, Hauser, Warren A, Dorsch
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Xanthones from Hypericum chinense

Phytochemistry, 2006
Six xanthones, 1,3,7-trihydroxy-2-(2-hydroxy-3-methyl-3-butenyl)-xanthone (1), 1,7-dihydroxy-2,3-[2''-(1-hydroxy-1-methylethyl)-dihydrofurano]-xanthone (2), 1,3,7-trihydroxy-5-methoxyxanthone (3), 1,7-dihydroxy-5,6-dimethoxyxanthone (4), 4,5-dihydroxy-2,3-dimethoxyxanthone (5), 1,3-dihydroxy-2,4-dimethoxyxanthone (6) and 21 known xanthones were ...
Naonobu Tanaka
exaly   +3 more sources

Metabolism of Xanthone in the Rat

Xenobiotica, 1974
Abstract1. The metabolism of xanthone by the rat has been investigated.2. The major unconjugated urinary metabolite was 4-hydroxyxanthone (24%). Smaller amounts of free 2-hydroxyxanthone (13%) and 3-hydroxy-xanthone (6%) were also formed. Other fluorescent metabolites were detected in trace amounts.3.
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