Ubenimex (INN), also known more commonly as bestatin, is a competitive, reversible protease inhibitor.

It is being studied for use in the treatment of acute myelocytic leukemia[8] and lymphedema.

[9] It is derived from Streptomyces olivoreticuli.

[10] Ubenimex has been found to inhibit the enzymatic degradation of oxytocin, vasopressin, enkephalins, and various other peptides and compounds.

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