Ubenimex

Ubenimex (INN), also known by the brand name bestatin, is a competitive protease inhibitor. It is an inhibitor of aminopeptidase B, leukotriene A4 hydrolase, and aminopeptidase N. It is being studied for use in the treatment of acute myelocytic leukemia. It is derived from Streptomyces olivoreticuli.