Keywords: (+)-K252a.svg Skeletal formula of K252a Created using http //www acdlabs com/download/chemsk html ACD/ChemSketch 10 0 and Inkscape Own work after J Am Chem Soc 1995 117 41 10413 “4 10 1021/ja00146a039 2008-01-20 Fvasconcellos Indole alkaloids Protein kinase inhibitors Indolocarbazoles |