A cell-permeable, reversible, ATP-competitive PKC inhibitor (IC50 = 15 nM, rat brain PKC); inhibits PKCα, βI, βII, γ, and ε with IC50 values of 8, 8, 14, 13, and 39 nM, respectively; also inhibits Cdk2 (IC50 = 200 nM) and GSK3α/β; used to activate mesenchymal stem cells and target their delivery to sites of inflammation