FLAVONOIDS IN GENOTYPES OF TRIFOLIUM SUBTERRANEUM .I. NORMAL FLAVONOID PATTERN OF GERALDTON VARIETY

Leaves of the Geraldton variety of subterranean clover (Trifolium subterraneum L.) have been found to contain kaempferol, quercetin, isorhamnetin, 4′,7-dihydroxyflavonol, fisetin, luteolin, 4′,7-dihydroxyflavone, 3′,4′,7-trihydroxyflavone, isoliquiritigenin and liquiritigenin. Three new compounds, 2′,4,4′-trihydroxy-3-methoxychalcone (homobutein), 4′,7-dihydroxy-3′-methoxyflavone (geraldone) and 4′,7-dihydroxy-3′-methoxyflavonol (geraldol), have also been found and have been synthesized. These flavonoids exist in clover predominantly as glycosides, nine of which have been isolated and characterized by chromatographic and spectrophotometric methods. Five of the glycosides have not been described previously. © 1969.