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DOI: 10.1055/s-2007-969133
© Georg Thieme Verlag Stuttgart · New York
6-Hydroxykynurensäure, die erste N-haltige Verbindung aus den Blättern von Ginkgo biloba
6-Hydroxykynurenic Acid, the First N-Containing Compound from the Ginkgo biloba LeafPublikationsverlauf
1985
Publikationsdatum:
26. Februar 2007 (online)
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Abstract
6-Hydroxykynurenic acid (6-HKA) has been isolated from an alcoholic extract of Ginkgo biloba leaves. Its structure was verified by 13C-NMR and other spectroscopic methods. The 6-HKA content increased continuously throughout leaf development and reached a maximum value of 0.24% at leaf abscission in autumn. 6-HKA, now isolated for the first time from a gymnosperm, seems to be a main metabolite of tryptophan in Ginkgo biloba.