Results 121 to 130 of about 1,463 (175)

Biflavonoids from Podocalyx loranthoides

Fitoterapia, 2003
Analysis of the ethyl acetate extract of the aerials parts of Podocalyx loranthoides led to the isolation of I 7, II 4'-dimethylamentoflavone (1) and II 4'-methylamentoflavone (2). Compound (1) gave a moderate effect against Leishmania mexicana promastigotes.
Alírica I, Suárez, Beth, Diaz M, Franco, Delle Monache, Reinaldo S, Compagnone   +3 more
openaire   +2 more sources

Biflavonoids from Lonicera japonica

Phytochemistry, 2005
Two biflavonoids, 3'-O-methyl loniflavone [5,5'',7,7''-tetrahydroxy 3'-methoxy 4',4'''-biflavonyl ether (1)] and loniflavone [5,5'',7,7'',3'-pentahydroxy 4',4'''-biflavonyl ether (2)] along with luteolin (3) and chrysin (4) were isolated from the leaves of Lonicera japonica.
Neeraj, Kumar, Bikram, Singh, Pamita, Bhandari, Ajai P, Gupta, Sanjay K, Uniyal, Vijay K, Kaul   +5 more
openaire   +2 more sources

Biflavonoids from Ouratea multiflora

Fitoterapia, 2001
A new flavone dimer, 3-hydroxy-4',5,7-trimethoxyflavone-(6-->8")-3"-hydroxy-3"',4"', 5",7"-tetramethoxyflavone, together with amenthoflavone, have been isolated from the leaves of Ouratea multiflora. Its structure was established by spectroscopic methods, including two-dimensional NMR spectroscopy.
J, D'arc Felicio, M H, Rossi, H R, Park, E, Gonçalez, M M, Braggio, J M, David, I, Cordeiro   +6 more
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Biflavonoids as novel antituberculosis agents

Bioorganic & Medicinal Chemistry Letters, 2001
A series of naturally occurring and synthetic biflavonoids was evaluated for inhibitory activity against Mycobacterium tuberculosis H37Rv (Mtb). Compounds 6, 24, and 25 demonstrated 96, 95, and 87% inhibition, respectively, at a screening concentration of 12.5 microg/mL.
Y M, Lin, M T, Flavin, C S, Cassidy, A, Mar, F C, Chen   +4 more
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Electrochemical synthesis of biflavonoids

Chemistry of Natural Compounds, 2013
Biologically active biflavonoids have consistently attracted the attention of researchers [1]. However, only a few of these compounds have a broad spectrum of biological activity. This has prompted scientists to prepare their semi-synthetic and synthetic analogs [2]. Thus, several approaches including metal-catalyzed cross coupling, oxidative coupling,
R. K. Nadirov, K. S. Nadirov, A. M. Esimova, Zh. K. Nadirova   +3 more
openaire   +1 more source

Two biflavonoids from Ouratea nigroviolacea

Phytochemistry, 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.
Ngo Mbing, J., Enguehard-Gueiffier, C., Atchade Ade, T., Allouchi, H., Gangoue Pieboji, Joseph, Mbafor, J. T., Tih, R. G., Pothier, J., Pegnyemb, D. E., Gueiffier, A.   +9 more
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The biflavonoids of Plagiomnium undulatum

Phytochemistry, 1996
Abstract The biflavonoid pattern of Plagiomnium undulatum has been studied. Besides two known biflavonoids the new 3‴-desoxydicranolomin, 2,3-dihydro-3‴-desoxydicranolomin and 2,3-dihydro-5′,3‴-dihydroxyrobustaflavone have been isolated, and their structures elucidated spectroscopically.
Christoph Rampendahl, Tassilo Seeger, Hans Geiger, Hans Dietmar Zinsmeister   +3 more
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A New Biflavonoid from Aristolochia contorta.

ChemInform, 2006
AbstractFor Abstract see ChemInform Abstract in Full Text.
Li-Li, Yu, Rong, Huang, Yu-Ping, Lv, Yong, Zhao, Yegao, Chen   +4 more
openaire   +2 more sources

Anti-influenza virus activity of biflavonoids

Bioorganic & Medicinal Chemistry Letters, 2007
Ginkgetin was found to inhibit the influenza virus sialidase. Ginkgetin-sialic acid conjugates showed a significant survival effect in the influenza-virus-infected mice.
Kazuhiko, Miki, Takayuki, Nagai, Kazushige, Suzuki, Ryo, Tsujimura, Kiyotaka, Koyama, Kaoru, Kinoshita, Kimio, Furuhata, Haruki, Yamada, Kunio, Takahashi   +8 more
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Neuroprotective effects of naturally occurring biflavonoids

Bioorganic and Medicinal Chemistry Letters, 2005
We examined neuroprotective effects of naturally occurring biflavonoids on oxidative stress-induced and amyloid beta peptide-induced cell death in neuronal cells. Among the nine biflavonoids tested, amentoflavone, ginkgetin, and isoginkgetin exhibited strong neuroprotection against cytotoxic insults induced by oxidative stress and amyloid beta ...
Byung Hee Han, Kun Ho Son, Su Jin Jeon
exaly   +3 more sources