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Planta Med 1986; 52(3): 235-236
DOI: 10.1055/s-2007-969133
Communications

© 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 LeafA. Schennen1 , 2 , J. Hölzl1
  • 1Institut für Pharmazeutische Biologie der Philipps-Universität Marburg/Lahn, Deutschhausstraße 17 1/2, D-3550 Marburg, Bundesrepublik Deutschland.
  • 2Teil der Dissertation von A. Schennen, in Vorbereitung.
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Publication History

1985

Publication Date:
26 February 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.