Potent and selective inhibitor of the homologous protein lysine methyltransferases, G9a and GLP (IC50 values are 6 nM and 15 nM for G9a and GLP, respectively). Potently blocks G9a/GLP methyltransferase activity in cells (IC50 = 10 nM in MCF7 cells); exhibits low cellular toxicity (EC50 = 4.7 μM in MCF7 cells). Selective for G9a/GLP over a range of other protein lysine methyltransferases and protein arginine methyltransferases. Purity 99%. MW (observed): 621.9