Product Name: Milk thistle extract Silymarin Latin Name: Fructus Silybum Marianum Extract Used Part: Seed Appearence: Light Yellow Powder Test Method: HPLC Active Ingredients: Silymarin Molecular Formula: C25H22O10 Molecular Mass: 482.436 CAS No.: 65666-07-1 Introduction of Silymarin: Milk thistle for annual or two year herb, native to southern Europe and north Africa, in Europe and Africa for thousands of years of cultivation and use of history, folk medicinal plants.