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1Author    Mitsuyoshi Sakasai3, Hiroki Fukui3, Hideyuki Yamane3, Naing Aung, Satoshi Kyaw3, Tahara3bRequires 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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 TEI-XML for    default:Reihe_C/55/ZNC-2000-55c-0165.pdf 
 Identifier    ZNC-2000-55c-0165 
 Volume    55 
2Author    Yusuke Shibuya, Satoshi Tahara, Yutaka Kimura, Junya MizutaniRequires 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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 TEI-XML for    default:Reihe_C/46/ZNC-1991-46c-0513.pdf 
 Identifier    ZNC-1991-46c-0513 
 Volume    46 
3Author    Didier Hallard, Ernst Bleichert, HubertG. Agnon, Satoshi Tahara, Ragai IbrahimRequires 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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 TEI-XML for    default:Reihe_C/47/ZNC-1992-47c-0346.pdf 
 Identifier    ZNC-1992-47c-0346 
 Volume    47