单词	hypericin
释义	hypericin /hʌɪˈpɛrɪsɪn / noun [mass noun] A substance found in St John’s wort, credited with chemical and pharmacological properties similar to those of antidepressants. A polycyclic quinone; chemical formula: C30H14O8. St.John's Wort contains hypericin, which inhibits monoamine oxidase, a chemical associated with depression.... The antitumor properties of St. John's wort are attributed to hypericin, which is a powerful photosensitizer. Today, St. John's wort standardized to 0.3% hypericin easily outsells its pharmaceutical rival, Prozac, and its derivatives. Origin Early 20th century: from hypericum + -in1.
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