silybin and its Impurities

Silybin is used to control and prevent liver damage (Hepatoprotector agent). Silybin is a naturally occurring flavonolignan and exits as a mixture of diastereomers Silybin A and Silybin B. Reference standards of Silybin API,and its pharmacopeial, non pharmacopeial impurities, and stable isotopes are listed below.