Cell-permeable. A broad spectrum matrix metalloprotease (MMP) inhibitor with Ki values of 0.4 nM, 0.5 nM, 27 nM, 3.7 nM, 0.1 nM, 0.2 nM, 3.6 nM, 13.4 nM, 0.36 nM for MMPs -1, -2, -3, -7, -8, -9, -12, -14, and -26, respectively.