Pharmaceutical secondary standards for application in quality control, provide pharma laboratories and manufacturers with a convenient and cost-effective alternative to the preparation of in-house working standards. Mercaptopurine is an anticancer and an immunosuppressive drug employed for the management of acute lymphocytic leukemia (ALL), chronic myeloid leukemia (CML), Crohn′s disease, etc. Its mode of action involves interference in the nucleic acid synthesis by the inhibition of purine metabolism.
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