Using COc1cc2c3c(c1)c(=O)c(Cc1cccnc1)cn3-c1cc(Br)ccc1S2 to produce COc1cc2c3c(c1)c(=O)ccn3-c1cc(Br)ccc1S2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.