The following are compounds found in St. John's wort:

• Anthracene derivatives (0.1 - 0.15%): favoring naphthadihydrodianthrones, in particular hypericin, pseudohypericin.
• Flavonoids (2-4%): such as hyperoside, quercitrin, rutin, and isquercitrin.
• Bioflavonoids including among others - amentoflavone.
• Xanthones: 1,3,6,7-tetrahydroxy-xanthone
• Acylphloroglucinols: hyperforin with small quantities of adhhyperforin.
• Volatile Oil: chief components aliphatic hydrocarbons, including 2-mthyloctane, undecane, dodecanol, caryophyllene and 2-methyl-3-but-3-en-2-ol.
• Oligomeric procyanidines
• Catechin tannins
• Caffeic acid derivatives: including cholorogenic acid.