9Katarina Hostauska, Juergen Reichling, Silvia Bommer, et al. Hyperforin a constituent of St John' s wort ( Hypericum perfora- tum L. ) extract induces apoptosis by triggering activation of caspases and with hypericin synergistically exerts cytotoxicity to- wards human malignant cell lines [ J 1. European Journal of Pharmaceutics and Biopharmaceutics, 2003, 56 : 121 - 132. 被引量:1