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강삼식(Sim Sik Kang),고영민(Young Min Koh),김주선(Ju Sun Kim),이명환(Myung Whan Lee),이동선(Dong Sun Lee) 한국생약학회 1995 생약학회지 Vol.26 No.1
6-Hydromykynurenic acid and ginkgolide B together with flavonol glycosides and biflavonoids were isolated from the yellow leaves of Ginkgo biloba and identified by means of spectroscopic methods. The correctness of Ho¨lzl`s <sup>13</sup>C-NMR assignments for 6-hydroxykynurenic acid was confirmed by HMQC and HMBC techniques. Based on our present findings, it may be considered that the yellow Ginkgo leaves may contribute to be a source of high medicinal values.