BOC Sciences provides a wide range of research chemicals and biochemicals including inhibitors, building blocks, carbohydrates, nucleosides, nucleotides, GMP Products, impurities and metabolites, APIs, natural compounds, ADCs, stem cell molecule and chiral compounds. Tacrolimus EP Impurity G is an impurity of Tacrolimus, which is a calcineurin inhibitor used as an immunosuppressant after organ transplantation to reduce the activity of the patient's immune system, thereby reducing the risk of organ rejection.