Chemical constituents of the combretaceae. Part I. Substituted phenanthrenes and 9,10-dihydrophenanthrenes from the heartwood of Combretum apiculatum

Authors:
  • RLR. M. Letcher
    R. M. Letcher
  • LNL. R. M. Nhamo
    L. R. M. Nhamo
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Abstract
Five new compounds isolated from the heartwood of Combretum apiculatum have been shown by chemical and spectroscopic methods, supported by synthesis, to be 4,7-dihydroxy-2,6-dimethoxy-, 4,7-dihydroxy-2,3,6-trimethoxy-, and 2,6-dihydroxy-3,4,7-trimethoxy-9,10-dihydrophenanthrene, and 2,6-dihydroxy-3,4,7-trimethoxy- and 4,6,7-trihydroxy-2,3-dimethoxyphenanthrene.