Results 141 to 150 of about 1,463 (175)

Abiesin, a biflavonoid of abies webbiana

Phytochemistry, 1984
Abstract Abiesin, a new biflavonoid, has been isolated from the leaves of Abies webbiana and identified as 5,3″,7″- trihydroxy-7,4′,4‴-trimethoxy-(3′,6″)-biflavone.
A. Chatterjee, J. Kotoky, K.K. Das, J. Banerji, T. Chakraborty   +4 more
openaire   +1 more source

Biflavonoid constituents of Campylospermum mannii

Biochemical Systematics and Ecology, 2009
Abstract Air dried leaves and stem bark of Campylospermum mannii used in the south of Cameroon by the Baka pigmies to remedy heart and stomach disorders have been examined for their photochemical content. Three biflavonoid, amentoflavone, robustaflavone and chamaejasmin were characterized alongside with two new biflavonoids, campylospermones A and ...
S.S. Elo Manga, A.E. Tih, R.T. Ghogomu, A. Blond, B. Bodo   +4 more
openaire   +1 more source

Biflavonoids from Ochna lanceolata

Phytochemistry Letters, 2008
Abstract Two new biflavonoids, 7,4′,7″,4‴-tetramethylisochamaejasmin ( 1 ) and 2,3-dihydroochnaflavone 7″- O - methyl ether ( 2 ), together with six known flavonoids ( 3 – 8 ) were isolated from the stem bark of Ochna lanceolata . Their structures were established on the basis of spectral studies.
Bandi A.K. Reddy, Nimmanapalli P. Reddy, Duvvuru Gunasekar, Alain Blond, Bernard Bodo   +4 more
openaire   +1 more source

Biflavonoids. Part 4. Structure and stereochemistry of novel flavanone- and the first isoflavanone-benzofuranone biflavonoids

Tetrahedron, 1999
Abstract The structure and stereochemistry of (2 R ,3 S )-naringenin-(3 α →5)-(2 R )-maesopsin, its isoflavanone analogue, (2 S ,3 R )-dihydrogenistein-(2 α →7)-(2 R )-maesopsin, and the 2S (F-ring) diastereomers of both compounds from the heartwood of Berchemia zeyheri were established by 1 H NMR and CD data.
Riaan Bekker, E.Vincent Brandt, Daneel Ferreira   +2 more
openaire   +1 more source

A biflavonoid from Cycas beddomei

Phytochemistry, 1998
A new biflavanone, tetrahydrohinokiflavone, together with amentoflavone has been isolated from the leaves of Cycas beddomei. The structures were established on the basis of spectral and chemical evidence.
M. Sobha Rani, C. Venkata Rao, D. Gunasekar, A. Blond, B. Bodo   +4 more
openaire   +1 more source

Aryllead triacetates as synthons for the synthesis of biflavonoids. Part 2. Synthesis of a Garcinia-type biflavonoid

Journal of the Chemical Society, Perkin Transactions 1, 1994
Arylation of 3-(phenylsulfonyl)chroman-4-one 1 with simple aryllead triacetates affords the corresponding 3-aryl-3-(phenylsulfonyl)chroman-4-one in 64–74% yield. However, no reaction took place with the hindered 2,4,6-trimethoxyphenyllead triacetate 9. Reaction of the 8-triacetoxyplumbylflavane derivative 10 with 4′-methoxy-3-(phenylsulfanyl)flavanone ...
Dervilla M. X. Donnelly, Brendan M. Fitzpatrick, Sarah M. Ryan, Jean-Pierre Finet   +3 more
openaire   +1 more source

ChemInform Abstract: Biflavonoids and Triflavonoids

ChemInform, 1995
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
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Biflavonoids from Ochna calodendron

Phytochemistry, 1994
Abstract The biflavonoids, lophirone K and calodenins A and B, were isolated from the stem bark of Ochna calodendron along with lophirone C. Their structures were determined from spectroscopic and chemical evidence.
Blaise Messanga, Raphael Ghogomu Tih, Beibam-Lucas Sondengam, Marie-Thérèse Martin, Bernard Bodo   +4 more
openaire   +1 more source

The biflavonoids of Garcinia volkensii (Guttiferae)

Phytochemistry, 1970
Abstract In addition to the known biflavonoids GB-1a, GB-2a and morelloflavone, the heartwood of Garcinia volkensii Engl. contains volkensiflavone, a new flavanone-flavone whose constituent units are naringenin and apigenin.
G.A. Herbin, B. Jackson, H.D. Locksley, F. Scheinmann, W.A. Wolstenholme   +4 more
openaire   +1 more source

Studies on the inhibition of α-glucosidase by biflavonoids and their interaction mechanisms

Food Chemistry, 2023
Xin Peng, Mengfan Wang, Jichen Yang
exaly