Results 111 to 120 of about 1,771 (139)

Dimethylchromene rotenoids from Tephrosia candida

Phytochemistry, 1997
Abstract The hexane and ethyl acetate extracts of roots of Tephrosia candida afforded a new rotenoid, 12a-hydroxy-β-toxicarol, together with a series of known ones, identified as: deguelin, α-toxicarol, tephrosin, 6a,12a-dehydrodeguelin, 12a-hydroxy-α-toxicarol, 6a,12a-dehydro-α-toxicarol and 6a,12a-dehydro-β-toxicarol.
Cesar C. Andrei, Paulo C. Vieira, João B. Fernandes, M.Fátima das G.F. da Silva, Edson Rodrigues^Fo   +4 more
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Rotenoids from Amorpha canescens roots

Phytochemistry, 1975
Abstract A new rotenoid termed amorpholone has been isolated from a hexane extract of Amorpha canescens roots and identified as 6-hydroxydehydrorotenone by spectroscopic methods. Its structure was conformed by its conversion to rotenonone and by synthesis from rotenone. Also isolated were rotenonone and acetylursolic acid.
David M. Piatak, Gary A. Flynn, Paul D. Sorensen   +2 more
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Rotenoids and Isoflavones fromSarcolobus globosus

Planta Medica, 2005
Sarcolobus globosus is a medicinal plant growing in mangrove forests in Asia. No constituents from this plant have been reported previously. From the diethyl ether extract of S. globosus a new rotenoid sarcolobin and a new isoflavone sarcolobone, as well as the previously known rotenoids tephrosin, 12aalpha-hydroxydeguelin, 11-hydroxytephrosin, 12a ...
Helle, Wangensteen, Mahiuddin, Alamgir, Sultana, Rajia, Anne Berit, Samuelsen, Karl Egil, Malterud   +4 more
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Antiinflammatory activity of rotenoids from Clitoria fairchildiana

Phytotherapy Research, 2002
Five structurally related rotenoids were isolated from the roots of Clitoria fairchildiana. The antiinflammatory activity was investigated using a capillary permeability assay. The protective effect was measured as the inhibition in vascular permeability produced by acetic acid in the peritoneal cavity. The results suggest that for maximum activity the
Bernadete, Pereira da Silva, José, Paz Parente   +1 more
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A New Rotenoid from Derris malaccensis

HETEROCYCLES, 2008
A new rotenoid named 6-oxo-dehydroelliptone (2) was isolated from the roots of Derris malaccensis Prain, along with six known compounds. The isolation of dehydroelliptone (1) from a natural source and its unequivocal 1 H and 13 C NMR assignments were reported for the first time.
Kittisak Likhitwitayawuid, Ruchira Wangteeraprasert   +1 more
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Reactions of rotenoids with hydroxylamine

Liebigs Annalen der Chemie, 1988
AbstractReaction of rotenone (1a) and amorphigenin (2a) with hydroxylamine in alkaline medium affords a mixture of the isoximes 5 and 6, and the new 6a‐NH2 spiro derivatives 12a, b and 13a, b. The structures, stereochemistry, and the mechanisms of formation of these products are discussed.
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Rotenoids from roots of Millettia pachycarpa

Phytochemistry, 1982
Abstract Roots of Millettia pachycarpa furnished retenone, cis -12a-hydroxyrotenone, rot-2′-enonic acid and cis -12a-hydroxyrot-2′-enonic acid.
Ashok Kumar Singhal, Ram Prakash Sharma, Jogendra Nath Baruah, Serengolam V. Govindan, Werner Herz   +4 more
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Biosynthesis of the rotenoid amorphigenin in germinating Amorpha fruticosa seeds: the pre-rotenoid (isoflavonoid) stages

Journal of the Chemical Society D: Chemical Communications, 1971
Insertion of the rotenoid ‘extra’ C-6 methylene occurs at the isoflavone (IIIa), rather than the isoflavanone (IVa), level of oxidation, in the biosynthesis of amorphigenin; earlier stages use chalcone (Va) with a free 4-hydroxy-group, but the biosynthetically acceptable isoflavone which emerges is not (VIa) but its methyl ether (VIb).
L. Crombie, P. M. Dewick, D. A. Whiting
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[Rotenoids from Derris trifoliata].

Zhong yao cai = Zhongyaocai = Journal of Chinese medicinal materials, 2008
Five rotenoids named dehydrodeguelin, dehydrorotenone, 12a-hydroxy rotenone, tephrosin and 12alphabeta-hydroxyrot-2'-enonic acid were isolated from aerial parts of Derris trifoliata. All these compounds were isolated from this plant for the first time.
Lu-Rong, Xu, Shan, Li, Jun, Wu, Si, Zhang   +3 more
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Chemistry of the Natural Rotenoids

1963
In many warm countries of the world the natives fish by throwing preparations of crushed plant material into ponds and streams. These preparations cause stupefaction of the fish, which rise to the surface and are collected. Plants which are frequently employed in South America, tropical Africa, the East Indies and Malaya belong to the Papilionatae sub ...
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