It is extracted from the plant "Sophora Flavescens Ait", which medicinally mainly refers to the dried root of Sophora Flavescens Ait. Which is a plant in the family Leguminosae? And it has a few other names, including Sophora Flavescens radix, light yellow sophora root, Flavescent Sophora Root, Root of Light Yellow Sophora, Sophora Flavescens Root, and more. It is produced all over China and harvested during spring and autumn.

Sophora root mainly contains alkaloids, flavonoids, quinones, and triterpenoid saponins. Alkaloids contain Matrine, oxymatrine, sophoridine, sophoranol, sophoramine, etc. Flavonoids contain kushenol, kuraridin, kuraridinol, kurarinol, neokurarinol, norkurarinol, isokurarinone, kurarinone, and more. Triterpenoid saponins include sophoraflavoside Ⅰ, Ⅱ, Ⅲ, Ⅳ, soyasaponin I, and so on. Quinones are kushequinone A and others.

The Matrine and Oxymatrine are two main ingredients, The Oxymatrine is transformed from Matrine.