| | 1 | Author
| Mitsuyoshi Sakasai3, Hiroki Fukui3, Hideyuki Yamane3, Naing Aung, Satoshi Kyaw3, Tahara3b | Requires cookie* | | | Title
| A New Class of Biflavonoids: 2'-Hydroxy genistein Dimers from the Roots of White Lupin  | | | | Abstract
| b C REST of Japan Science and Technology Corporation. Fax: + 8 1 -1 1 -7 0 6 -4 1 8 2 . E-mail: tahara@abs.agr.hokudai.ac.jp Two novel isoflavonoid dimers presumably originating from 2'-hydroxygenistein, 5,7,4'-trihydroxycoumaranochroman-4-one-(3-*5'")-5",7",2'",4'"-tetrahydroxyisoflav-one (1, lupinal-bisone A) and 5,7,4'-trihydroxycoumaranochro-man-4-one-(3—>-6")-5",7",2"',4"'-tetrahydroxy-isoflavone (2, lupinalbisone B) were isolated from the roots of Lupinus albus L., and their structures involving relative stereochemistry were elucidated by spectroscopic methods. U sing horse radish peroxidase and 2'-hydroxygenistein (3) as the substrate revealed the for mation o f these dimers together with 5,7,4'-trihydroxycoumaronochromone (4, lupinalbin A). Dimerization of 3 caused a remarkable increase of antifungal activity. | | | |
Reference
| Z. Naturforsch. 55c, 165 (2000); received November 8/Decem ber 21 1999 | | | |
Published
| 2000 | | | |
Keywords
| Lupinus albus, Biflavonoids, 2'-Hydroxygenistein | | | |
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| default:Reihe_C/55/ZNC-2000-55c-0165.pdf | | | | Identifier
| ZNC-2000-55c-0165 | | | | Volume
| 55 | |
| 2 | Author
| Yusuke Shibuya, Satoshi Tahara, Yutaka Kimura, Junya Mizutani | Requires cookie* | | | Title
| New Isoflavone Glucosides from White Lupin (Lupinus albus L.) | | | | Abstract
| Further investigation of polar constituents in white lupin roots revealed the presence of genistein 7-O-ß-glucoside (la), genistein 4'-0-ß-glucoside (lb), 2'-hydroxygenistein 7-0-ß-glucoside (2a) and 2'-hydroxygenistein 4'-0-ß-glucoside (2b) as simple isoflavone gluco sides; luteone 7-O-ß-glucoside (3 a), licoisoflavone A 7-O-ß-glucoside (4 a) and licoisoflavone A 4'-0-ß-glucoside (4b) as prenylated (= 3,3-dimethylallyl-substituted) isoflavone glucosides; and genistein 7-0-ß-(6"-0-malonyl)glucoside (lam) and 2'-hydroxygenistein 7-0-ß-(6''-0-malonyl)glueoside (2 am) as malonylated isoflavone glucosides. Six compounds (2 a, 2 b, 3 a, 4a, 4b, and 2am) are new naturally occurring isoflavone glucosides. | | | |
Reference
| Z. Naturforsch. 46c, 513—518 (1991); received February 12/May 2 1991 | | | |
Published
| 1991 | | | |
Keywords
| Isoflavonoids, Malonylglucosides, White Lupin, Lupinus albus, Leguminosae | | | |
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| default:Reihe_C/46/ZNC-1991-46c-0513.pdf | | | | Identifier
| ZNC-1991-46c-0513 | | | | Volume
| 46 | |
| 3 | Author
| Didier Hallard, Ernst Bleichert, HubertG. Agnon, Satoshi Tahara, Ragai Ibrahim | Requires cookie* | | | Title
| Production and Release of Isoflavonoids by Lupin Cell Cultures | | | | Abstract
| Cell cultures derived from white lupin (Lupinus albus) radicles consist o f a mixture o f friable cell aggregates and finely divided cells. Both types o f tissue accumulate two isoflavonoid aglu-cones, genistein and 2'-hydroxygenistein, their 7-O-glucosides, and their respective 6-, 8-, and 3'-monoprenyl-, as well as the 6,3'-diprenyl derivatives. M ost o f these metabolites are differen tially released in the culture medium. The relative am ounts o f aglucones, glucosides and preny-lated derivatives that are produced by the aggregates and cells, as well as those excreted into the medium, are discussed in relation to culture growth. | | | |
Reference
| Z. Naturforsch. 47c, 346 (1992); received December 23 1991 | | | |
Published
| 1992 | | | |
Keywords
| Lupinus albus, Fabaceae, Cell Culture, Isoflavonoid Production, Genistein | | | |
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| default:Reihe_C/47/ZNC-1992-47c-0346.pdf | | | | Identifier
| ZNC-1992-47c-0346 | | | | Volume
| 47 | |
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