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Xanthones as Potential Antioxidants
Current Medicinal Chemistry, 2013Xanthones (dibenzo-γ-pyrones) constitutes an important class of oxygenated heterocycles and occur as secondary metabolites in plants and microorganisms. They are known for various biological activities such as antioxidant, monoamine oxidase inhibitor, antihypertensive, hepatoprotective, antithrombotic, antifungal and anticancer.
S S, Panda +3 more
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Xanthones from Hypericum roeperanum
Phytochemistry, 1996Four new xanthones have been isolated from the roots of Hypericum roeperanum. Their structures have been established by a combination of spectroscopic and chemical methods as 1,6-dihydroxy-5-methoxy-4',5'-dihydro-4',4',5'-trimethylfurano- (2',3':3,4)-xanthone (5-O-methyl-2-deprenylrheediaxanthone B), 1,6-dihydroxy-5-methoxy-6',6'-dimethylpyrano-(2',3 ...
G, Rath +3 more
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Xanthones-A Structural Perspective
Current Medicinal Chemistry, 2005Xanthones, synthesized or isolated from a natural source, display a wide range of biological and pharmacological activities. In a few cases, their chemical characterization has involved the structure elucidation by single crystal X-ray diffraction.
L, Gales, A M, Damas
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Xanthone: A Promising Antimycobacterial Scaffold
Medicinal Chemistry, 2021Background: 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 +4 more
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Novel xanthones from Garcinia mangostana, structures of BR-xanthone-A and BR-xanthone-B
Phytochemistry, 1988Abstract 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 +1 more
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Xanthone Analogue of Geiparvarin
Archiv der Pharmazie, 1985AbstractThe synthesis and the pharmacological properties of the xanthone analogue of geiparvarin, a naturally occurring antitumor coumarin, are described.
P, Valenti +5 more
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Sulfonated Xanthones from Hypericum sampsonii.
ChemInform, 2004Xanthones, 1,3-dihydroxy-5-methoxyxanthone-4-sulfonate and 1,3-dihydroxy-5-O-beta-D-glycopyranosylxanthone-4-sulfonate, together with nine known compounds were obtained from H. sampsonii. This is the first report of sulfonated xanthonoids. Furthermore, compounds 1 and 2 exhibited significant cytotoxicity against the P388 cancer cell line.
Di, Hong +3 more
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Xanthones fromChironia krebsii
Phytochemistry, 1991Abstract From a dichloromethane extract of the aerial parts and from a methanolic root extract of Chironia krebsii , 11 1-hydroxyxanthones and six xanthone glycosides have been isolated. The glycosides 5-hydroxy-3-methoxy-1- O -primeverosylxanthone, 1-hydroxy-3-methoxy-5- O -primeverosylxanthone, 5-hydroxy-3-methoxy-1- O -β- d -glucosyl-xanthone, 3,5,
J.-L. Wolfender +3 more
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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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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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Phytochemistry, 1989
Abstract Since the last review in 1980, over eighty new xanthones have been isolated from the Guttiferae. These are listed with reference to structure elucidation and synthesis. The distribution of xanthones is examined in relation to the taxonomic divisions of the Guttiferae.
Graham J. Bennett, Hiok-Huang Lee
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Abstract Since the last review in 1980, over eighty new xanthones have been isolated from the Guttiferae. These are listed with reference to structure elucidation and synthesis. The distribution of xanthones is examined in relation to the taxonomic divisions of the Guttiferae.
Graham J. Bennett, Hiok-Huang Lee
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