FDA approved this drug for using in the kidney transplantation after phase I, II, III wide clinical trail in 1995. It is also proved effective for heart, lung, and liver transplantation in addition to kidney transplantation. It prevents pathological changes of the transplanted organ. It is also proved effective in treatment of autoimmune disease such as systemic lupus erythematosus.CAS No.: 128794-94-5 Appearance: White crystalline powder Molecular Formula: C23H31NO7 Loss on drying: 0.5% max. Heavy Metals: 20ppm max. Content: 98 102% 25kg/carton drum0.