UCD38B hydrochloride is a cell permeant, competitive enzymatic uPA inhibitor with an IC 50 value of 7 μM. UCD38B hydrochloride targets intracellular uPA causing mistrafficking of uPA into perinuclear mitochondria, reducing the mitochondrial membrane potential, and followed by the release of apoptotic inducible factor (AIF). UCD38B hydrochloride induces apoptosis.