Premium
NMR spectral assignments of a new [COC] isoflavone dimer from Andira surinamensis
Author(s) -
de Almeida José Gustavo L.,
Silveira Edilberto R.,
Pessoa Otília Deusdênia L.
Publication year - 2008
Publication title -
magnetic resonance in chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.483
H-Index - 72
eISSN - 1097-458X
pISSN - 0749-1581
DOI - 10.1002/mrc.2138
Subject(s) - chemistry , heteronuclear molecule , lupeol , biochanin a , stereochemistry , dimer , nuclear magnetic resonance spectroscopy , homonuclear molecule , isoflavones , organic chemistry , daidzein , molecule , biochemistry , genistein , medicine
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.