Beijing Rexun Pharma provides the services of synthesis and identification of impurity to our customers and we have the following APIs' impurities as our products:Entecavir, Clopidogrel, Tenofovir Disoproxil Fumarate (in stock), Capecitabine, Prasugrel, Roflumilast, Imatinib, Perindopril, Abiraterone, Progesterone, Moxifloxacin, Aprepitant (in stock) and Lurasidone (in stock), Bortezomib (in stock), Venlafaxine (in stock). etc.