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NMR spectral assignments of a new [COC] isoflavone dimer from Andira surinamensis

✍ Scribed by José Gustavo L. de Almeida; Edilberto R. Silveira; Otília Deusdênia L. Pessoa

Publisher
John Wiley and Sons
Year
2007
Tongue
English
Weight
123 KB
Volume
46
Category
Article
ISSN
0749-1581

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✦ Synopsis

Abstract

The phytochemical investigation of extracts from the branch wood and branch barks of Andira surinamensis yielded a novel isoflavone dimer, 4′‐methoxyisoflavone‐(7‐O‐7″)‐3″′,4″′‐methylenedioxyisoflavone (surinamensin), along with the triterpene lupeol and the known isoflavones 5,7‐dihydroxy‐4′‐methoxyisoflavone (biochanin A), 5,4′‐dihydroxy‐7‐methoxyisoflavone (prunetin), 7,3′‐dihydroxy‐4′‐methoxyisoflavone (calycosin), and 5,7,3′‐trihydroxy‐4′‐methoxyisoflavone (pratensein). The structure of the new isoflavone was elucidated by 1D and 2D homonuclear and heteronuclear NMR spectroscopy and by comparison with published data for closely related compounds. Copyright © 2008 John Wiley & Sons, Ltd.

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