Results 161 to 170 of about 13,213 (206)

Prenylated flavonoids from Tephrosia spinosa

Phytochemistry, 1992
Abstract The isolation and characterization of a new chalcone, spinochalcone C, and two new flavanones, spinoflavanones A and B, from various parts of Tephrosia spinosa are reported in addition to the known flavanone, fulvinervin A.
E.Venkata Rao, Y.Rajendra Prasad
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Prenylated Flavonoids from Tephrosia apollinea

HETEROCYCLES, 2007
Re-investigation of the chloroform extract of the aerial part of Tephrosia apollinea afforded seven new 8-prenylated flavonoids namely tephroapollin A-G (1-7). The structures were established by spectroscopic methods, including HR-CI-MS, 1 H, 13 C, DEPT, HMQC, HMBC and ROESY experiments.
Mohamed H. Abdel-Razek, Abou El-Hamd H. Mohamed, Ahmed A. Ahmed   +2 more
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Prenylated flavonoids from Tephrosia apollinea

Chinese Chemical Letters, 2009
Abstract In continuation of our chemical investigation on some medicinal plants of the genus Tephrosia, re-investigation of the methylenechloride/methanol (1:1) extract of the air-dried aerial part of Tephrosia apollinea afforded a new prenylated flavonoid 1, in addition to an aromatic ester, a sesquiterpene, a lignan and several known prenylated ...
Ali K. Khalafallah, Suleiman A. Suleiman, Afifi H. Yousef, Nadia A.A. El-kanzi, Abou El-Hamd H. Mohamed   +4 more
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Fungal metabolism of prenylated flavonoids

Phytochemistry, 1997
Abstract When incubated in liquid culture with Aspergillus flavus , the prenylated flavanone 6-prenylnaringenin [(2 S )-6-(3,3-dimethylallyl)-5,7,4′-trihydroxyflavanone] was converted into 2,3-dihydrodihydroxy-prenyl-substituted naringenin, 6-prenylnaringenin hydrate, and dihydrofurano-substituted naringenin.
Satoshi Tahara, Mitsuharu Tanaka, Wolfgang Barz   +2 more
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Prenylated flavonoids from Maclura pomifera

Phytochemistry, 1998
Abstract Eight prenylated flavonoids, including three new compounds, have been isolated from chloroform extracts of stems and leaves of Maclura pomifera . The new prenylated flavonoids have been characterized as 5,7,4′,2″-tetrahydoxy-6-[3″-methyl-but-3″-enyl]-flavone, 5,4′-dihydroxy-2″-(1-hydroxy-1-methylethyl)-3″-methoxyfurano (4″,5″ (6,7 ...
Sang-Jun Lee, Angela R. Wood, Camelia G.-A. Maier, Richard A. Dixon, Tom J. Mabry   +4 more
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Mass Spectrometry of Prenylated Flavonoids

HETEROCYCLES, 1992
The fragmentation patterns originating from the degradation of prenyl group(s) in positive ion electron ionization (EI), fast-atom bombardment (FAB) and chemical ionization (CI) mass spectrometry (MS) of prenylated flavonoids were reviewed. The EI spectra showed the characteristic fragmentation patterns reflecting the location of prenyl group in the ...
Taro Nomura, Mitsuo Takayama, Toshio Fukai, Yoshio Hano   +3 more
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Prenylated flavonoids from Commiphora opobalsamum stem bark

Phytochemistry, 2017
A phytochemical study on the stem bark of Commiphora opobalsamum looking for cytotoxic compounds afforded eleven flavonoids, including six previously undescribed prenylated congeners, comophorin A-E, and comophoroside A. The structures of the isolated compounds were elucidated on the basis of spectroscopic evidences and correlated with known compounds.
Ali A, El-Gamal, Shaza M, Al-Massarani, Wael M, Abdel-Mageed, Amina, El-Shaibany, Hassan M, Al-Mahbashi, Omer A, Basudan, Farid A, Badria, Mansour S, Al-Said, Maged S, Abdel-Kader   +8 more
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Complementary Flavonoid Prenylations by Fungal Indole Prenyltransferases

Journal of Natural Products, 2015
Flavonoids are found mainly in plants and exhibit diverse biological and pharmacological activities, which can often be enhanced by prenylations. In plants, such reactions are catalyzed by membrane-bound prenyltransferases. In this study, the prenylation of nine flavonoids from different classes by a soluble fungal prenyltransferase (AnaPT) involved in
Kang, Zhou, Xia, Yu, Xiulan, Xie, Shu-Ming, Li   +3 more
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O-Prenylated flavonoids from Dalbergia sissoo

Phytochemistry Letters, 2008
Abstract A chalcone, 2,3-dimethoxy-4′-γ,γ-dimethylallyloxy-2′-hydroxychalcone ( 1 ) and an isoflavone, 7-γ,γ-dimethylallyloxy-5-hydroxy-4′-methoxyisoflavone ( 2 ) together with a known flavone, 7-hydroxy-6-methoxyflavone ( 3 ), a known isoflavone, biochanin A ( 4 ) and a known rotenoid, dehydroamorphigenin ( 5 ) were isolated from the root bark of ...
Ramireddy V. Narahari Reddy, Nimmanapalli P. Reddy, Shaik I. Khalivulla, Mopuru V. Bhaskar Reddy, Duvvuru Gunasekar, Alain Blond, Bernard Bodo   +6 more
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Prenylated flavonoids from Tephrosia purpurea seeds

Phytochemistry, 1982
Abstract Two new prenylated flavonoids, purpuritenin purpureamethide, have been characterized from the seeds of Tephrosia purpurea together with the known ...
Bharati Sinha, A.A. Natu, D.D. Nanavati
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