Hyperforin analogues from St. John's wort (Hypericum perforatum).

@article{Verotta2000HyperforinAF,
  title={Hyperforin analogues from St. John's wort (Hypericum perforatum).},
  author={Luisella Verotta and Giovanni Appendino and Jasmin Jakupovic and Ezio Bombardelli},
  journal={Journal of natural products},
  year={2000},
  volume={63 3},
  pages={412-5}
}
Three oxygenated analogues of the prenylated phloroglucinol hyperforin (3-5) were isolated from the aerial parts of Hypericum perforatum and their structures elucidated by spectroscopic methods.