Brondz, I., Greibrokk, T., Groth, P.A. and Aasen, A.J. (1982) The Relative Stereochemistry of Hyperforin—An Antibiotic from Hypericum perforatum L. Tetrahedron Letters, 23, 1299-1300.
https://doi.org/10.1016/S0040-4039(00)87088-4

has been cited by the following article:

• TITLE: Super Antibiotics, Part IV. Hyperforin, Relative and Absolute Stereochemistry Elucidated by Gas-Chromatography Mass-Spectrometry with Supersonic Molecular Beams

  AUTHORS: Ilia Brondz

  KEYWORDS: Hyperforin, Perforatrin, Relative and Absolute Stereochemistry, Gas Chromatography-Mass Spectrometry, Chirality

  JOURNAL NAME: International Journal of Analytical Mass Spectrometry and Chromatography, Vol.5 No.3, September 22, 2017

  ABSTRACT: Relative and absolute stereochemistry for hyperforin has been proposed by Brondz et al. was supported and new isomer of hyperforin-perforatrin has been discovered. Relative and absolute stereochemistry for perforatrin was proposed and elucidated by using gas-chromatography mass-spectrometry with supersonic molecular beams (SMB). The possibility of the existence of ambiguities in chirality as a hypothesis for the existence, and a new understanding, of chiral substances with shifting chirality is presented.