5-Oxonoraporphines from Mitrephora cf. maingayi.

  title={5-Oxonoraporphines from Mitrephora cf. maingayi.},
  author={Nancy H. Lee and Yan Xu and Swee Han Goh},
  journal={Journal of natural products},
  volume={62 8},
Two new 5-oxonoraporphines, 1 and 2, together with three known compounds, ouregidione, 3-methoxycepharadione B, and isoelemicin, have been isolated from the bark of Mitrephora cf. maingayi. Structures of 1 and 2 were determined to be 1,2,3-trimethoxy-5-oxonoraporphine and 1,2-dimethoxy-3-hydroxy-5-oxonoraporphine on the basis of NMR and MS studies. 

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