K-252c is a staurosporine analog isolated from Nocardiopsis sp. and is a cell-permeable PKC inhibitor (IC50: 2.45 μM). K-252c also inhibits β-lactamase, chymotrypsin, and malate dehydrogenase. K-252c causes apoptosis in human chronic myelogenous leukemia cancer cells.
Imatinib is a multi-target inhibitor of v-Abl, c-Kit, and PDGFR (IC50: 0.6 μM, 0.1 μM, and 0.1 μM, respectively). Imatinib is used to treat chronic myelogenous leukemia (CML), gastrointestinal stromal tumors (GISTs), and a number of other malignancies.