A cell permeable, reversible, selective protein kinase C (PKC) inhibitor (IC50 = 158 nM for rat brain PKC) that acts at the ATP binding site of PKC. Does not inhibit the tyrosine phosphorylation or the activation of phospholipase Cγ1. Exhibits some degree of PKC isozyme specificity (IC50 = 53 nM for PKCα, 195 nM for PKCβI, 163 nM for PKCβII, 213 nM for PKCγ, and 175 nM for PKCε). Inhibits carbachol-evoked noradrenaline release (IC50 = 600 nM).
