Chinese Journal of Magnetic Resonance ›› 1997, Vol. 14 ›› Issue (4): 299-306.

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2D NMR STUDIES ON CHEMICAL STRUCTURE OF A NEW COMPOUND OF KAURAN

Fu Hongzheng, Lin Wenhan   

  1. National Research Laboratories of Natural and Biomimetic Drugs, Beijing Medical University, Beijing 100083
  • Received:1997-03-03 Revised:1997-04-21 Published:1997-08-05 Online:2018-01-22

Abstract: A New Kauran compound was isolated from the herbs of Siegesbeckia pubascens, named as 17-isobuthyloxy-18-hydroxy-kauran-19-oic acid, all the 1H and 13C NMR chemical shifts of the com-pound were assigned by 1H-1H COSY, 13C-1H COSY, NOESY, HMBC, 2D NMR techniques. Its relative configuration is discussed by NOESY, The connection position of acyl radical in the structure was assigned by HMBC.

Key words: Kauran, Diterpene, 2D NMR