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Contact SupplierSirolimus (also known as rapamycin) is a white-to-off-white amorphous raw material powder (API) with CAS number 53123-88-9. It is a potent immunosuppressant macrocyclic lactone produced by the bacterium Streptomyces hygroscopicus, used to prevent organ rejection. It acts by inhibiting cell division and mTOR.





