Results 131 to 140 of about 1,463 (175)

Diastereoisomeric biflavonoids and a cleaved biflavonoid from Ochna rhizomatosa

Planta Medica
Biflavonoids are structurally diverse secondary metabolites with biological activity of high relevance, such as anticancer, antibacterial, antioxidant and anti-inflammatory, among others [1] [2]. In this study, we report the isolation of two diastereoisomeric biflavonoids (Fig.
Tchoukoua, Abdou, Frese, Marcel, Sewald, Norbert   +2 more
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A bioactive biflavonoid from Campnosperma panamense

Fitoterapia, 2004
Lanaroflavone (1), a biflavonoid isolated from the methanol extract of the aerial part of Campnosperma panamense by bioguided fractionation, has been assessed for in vitro antiprotozoal activity. Lanaroflavone showed both antimalarial and leishmanicidal activities, but was inactive against Chagas disease vector, Trypanosoma cruzi.
B, Weniger, C, Vonthron-Sénécheau, G J, Arango, M, Kaiser, R, Brun, R, Anton   +5 more
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Synthesis of Phospholipase A₂ Inhibitory Biflavonoids.

ChemInform, 2006
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Jianjun, Chen, Hyeun Wook, Chang, Hyun Pyo, Kim, Haeil, Park   +3 more
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Tetraflavonoid and biflavonoids from Aristolochia ridicula

Phytochemistry, 2008
Biflavones, a chalcone-flavone, and a tetraflavonoid with a new carbon skeleton were isolated from the leaves of Aristolochia ridicula. Their structures were determined by chemical derivatizations and spectrometric analyses.
Machado, Marcos B., Lopes, Lucia Maria Xavier   +1 more
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Cytotoxic biflavonoids from Selaginella willdenowii

Phytochemistry, 1995
Bioactivity-guided fractionation of the leaves of Selaginella willdenowii afforded three known biflavones, 4',7"-di-O-methylamentoflavone, isocryptomerin and 7"-O-methylrobustaflavone, that were significantly cytotoxic against a panel of human cancer cell lines. Non-cytotoxic isolates were also obtained, namely, amentoflavone, bilobetin, robustaflavone
G L, Silva, H, Chai, M P, Gupta, N R, Farnsworth, G A, Cordell, J M, Pezzuto, C W, Beecher, A D, Kinghorn   +7 more
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Crystal structure of 2,4′-biflavonoid

Journal of Chemical Crystallography, 1997
The X-ray crystal structure of 2,4′-biflavonoid has been determined. Colorless regular prism shaped crystals of C30H22O4 crystallize in the space group $$P\bar 1$$ with cell dimensionsa=11.574(1) A,b=12.235(1) A,c=17.428(1) A, α=108.46(3)o, β=80.08(1)o, γ=103 ...
Chuan-Feng Chen, Jian-Hua Xu, Ying Zhu, You-Cheng Liu   +3 more
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Biflavonoids from Daphne linearifolia Hart.

Phytochemistry Letters, 2012
Abstract Two new biflavonoids, 2″-hydroxygenkwanol A ( 1 ) and 4′-methylgenkwanol A ( 2 ), together with fourteen known compounds were isolated from the aerial parts of Daphne linearifolia Hart. Their chemical structures were elucidated by extensive NMR spectral studies, as well as by ESI-MS analysis.
MALAFRONTE, NICOLA, Vassallo Antonio, DAL PIAZ, FABRIZIO, Bader Ammar, Braca Alessandra, DE TOMMASI, Nunziatina   +5 more
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A new biflavonoid fromOchna Beddomei

Journal of Asian Natural Products Research, 2003
A new biflavonoid, 2,3-dihydroochnaflavone 7,4',7"-tri-O-methyl ether (1) together with two known biflavonoids namely, 2,3-dihydroochnaflavone (2) and ochnaflavone (3) were isolated from the stem bark of Ochna beddomei. The structures were determined by means of spectral and chemical studies.
Jayakrishna, G., Reddy, M.K., Jayaprakasam, B., Gunasekar, D., Blond, A., Bodo, B.   +5 more
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Biflavonoids and Proanthocyanidins

1989
The biflavonoids and proanthocyanidins constitute the two major classes of oligomeric flavonoids found in plants (126, 136). The biflavonoids are oxidative coupling products leading to biflavones, flavanone-flavones, and biflavanones. These compounds always carry carbonyl functions at the C-4 positions (126).
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Biflavonoids from Daphne odora

Phytochemistry, 1995
Abstract Two new biflavonoids, daphnodorins E and F, were isolated from the roots of Daphne odora and their structures established from spectral and chemical evidence.
Kimiye Baba, Michi Yoshikawa, Masahiko Taniguchi, Mitsugi Kozawa   +3 more
openaire   +1 more source