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Identification of the phyto‐oestrogen 3′,7‐dihydroxyisoflavan, an isomer of equol, in human urine and cow's milk
Author(s) -
Bannwart C.,
Adlercreutz H.,
Wähälä K.,
Kotiaho T.,
Hesso A.,
Brunow G.,
Hase T.
Publication year - 1988
Publication title -
biomedical and environmental mass spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.475
H-Index - 121
eISSN - 1096-9888
pISSN - 0887-6134
DOI - 10.1002/bms.1200170104
Subject(s) - urine , equol , identification (biology) , cow milk , chemistry , chromatography , food science , biology , endocrinology , botany , daidzein , genistein
The isoflavonoid diphenol 3′,7‐dihydroxyisoflavan (1), an isomer of the known compound equol (4′,7‐dihydroxyisoflavan) (2), has been identified in human urine and in cow's milk. The compound was isolated as the glucuronide, purified by column chromatography and identified after hydrolysis to the aglycon. The trimethylsilyl ether derivative was characterized by comparison of its mass spectrum and chromatographic properties with those of synthesized silyated isomers of equol.