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'Piscidone' in keywords Facet   section ZfN Section C  [X]
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1991 (1)
1989 (1)
1Author    JohnL. Ingham, SatoshiT. Ahara, Seiji Shibaki, Junya MizutaniRequires cookie*
 Title    Isoflavonoids from the Root Bark of Piscidia erythrina and a Note on the Structure of Piscidone  
 Abstract    A m ethanolic extract of P iscidia erythrina root bark has been found to contain various isofla-vonoids including rotenone (rotenoid), lisetin (coum aronochrom one) and six known isoflavones (ichthynone, piscidone, piscerythrone, 2'-deoxypiscerythrone, 6'-prenylpiscerythrone and 3',5'-diprenylgenistein). The extract additionally yielded three new 5-hydroxyisoflavones (piscery-thrinetin, 2'-hydroxypiscerythrinetin and isow ighteone) and a previously unreported coum arono­ chrom one (8-prenyl-lisetin). A ll four com pounds were identified using a com bination o f spectro­ scopic (U V , M S, 'H NM R) and chemical m ethods. Although several other 5-hydroxyisoflavones were also isolated from the root bark extract, the quantities o f each were sufficient only to permit their partial characterization. Structure 2 for piscidone has been confirmed by 'H N M R spectros­ copy. 
  Reference    Z. Naturforsch. 44c, 905 (1989); received June 13 1989 
  Published    1989 
  Keywords    Legum inosae, Piscidia, Isoflavonoids, Isoflavones, C oum aronochrom one, Piscidone 
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 TEI-XML for    default:Reihe_C/44/ZNC-1989-44c-0905.pdf 
 Identifier    ZNC-1989-44c-0905 
 Volume    44 
2Author    Satoshi Tahara, JohnL. Ingham, Junya MizutaniRequires cookie*
 Title    Substrate Specificity in the Fungal Metabolism of Prenylated Flavonoids  
 Abstract    The prenylated flavonoids, topazolin [5,7,4'-trihydroxy-3-methoxy-6-(3,3-dimethylaIlyl)-flavone], piscerythrone [5,7,2',4'-tetrahydroxy-5'-methoxy-3'-(3,3-dimethylallyl)isoflavone] and piscidone [5,7,4',5'-tetrahydroxy-2'-methoxy-6'-(3,3-dimethylallyl)isoflavone] were meta­ bolized by Aspergillus flavus and Botrytis cinerea to give a variety of products. Topazolin and piscerythrone were converted by both fungi to com pounds similar to those previously ob­ tained from luteone (6-prenyl) and licoisoflavone A (3'-prenyl) respectively. The 6'-prenylated isoflavone piscidone was metabolized only by B. cinerea to give the corresponding dihydro-pyrano-isoflavone as a m ajor product. N either fungus was found to metabolize the 8-prenylated pyranoflavanonol lupinifolinol. 
  Reference    Z. Naturforsch. 46c, 341—348 (1991); received January 181991 
  Published    1991 
  Keywords    Prenylated Isoflavones, Flavone, Aspergillus fla m s, Botrytis cinerea, Fungal Metabolism, Piscidone, Piscerythrone, Topazolin 
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 TEI-XML for    default:Reihe_C/46/ZNC-1991-46c-0341.pdf 
 Identifier    ZNC-1991-46c-0341 
 Volume    46