Chemical Studies on “Clover Sickness” Part I. Isolation and Structural Elucidation of Two New Isoflavonoids in Red Clover

Saburo TAMURA; Ching-Fun CHANG; Akinori SUZUKI; Sumio KUMAI

doi:10.1271/bbb1961.33.391

Agricultural and Biological Chemistry

Online ISSN : 1881-1280
Print ISSN : 0002-1369
ISSN-L : 0002-1369

Chemical Studies on “Clover Sickness”

Part I. Isolation and Structural Elucidation of Two New Isoflavonoids in Red Clover

Saburo TAMURA, Ching-Fun CHANG, Akinori SUZUKI, Sumio KUMAI

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JOURNAL FREE ACCESS

1969 Volume 33 Issue 3 Pages 391-397

DOI https://doi.org/10.1271/bbb1961.33.391

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Abstract

Two new isoflavonoids were isolated from red clover as germination inhibitors for the same plant and their structures were determined as a glucoside of biochanin A (7-D-β-glucosyl-5, 7-dihydroxy-4'-methoxyisoflavone) (II) and its 5-malonate (I), respectively. Besides these compounds the following substances were also isolated as inhibitors: trifolirhizin (III), ononin (IV), daidzein (V) and its 7-glucoside (VI), formononetin (VII), genistein (VIII) and biochanin A (IX).

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