What is the raw material of St. John's bread essence?

Hypericin, hypericin, flavonoids, tannins. According to the information of St. John's bread essence, it is known that St. John's bread essence is made of hypericin, hypericin, flavonoids, tannins and so on. St John's wort extract can inhibit the reabsorption of norepinephrine (ne), 5- hydroxytryptamine (5HT) and dopamine (DA) by presynaptic membrane at the same time, and increase the concentration of three neurotransmitters in synaptic cleft.