Identification of the major constituents of Hypericum perforatum by LC/SPE/NMR and/or LC/MS Tatsis, Evangelos C. ; Boeren, Sjef ; Exarchou, Vassiliki ; Troganis, Anastassios N. ; Vervoort, Jacques ; Gerothanassis, Ioannis P. Abstract Publication: Phytochemistry Pub Date: February 2007 DOI: 10.1016/j.phytochem.2006.11.026 Bibcode: 2007PChem..68..383T