DOI:
10.1055/s-00000058
Planta Medica
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References
Ruckert U, Likussar W, Michelitsch A.
Simultaneous determination of total hypericin and hyperforin in St. John's wort extracts by HPLC with electrochemical detection.
Phytochem Anal 2007; 18: 204-8
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