Using CC(=O)c1cc(Cl)c2cncn2c1N1CCNCC1, COCCBr to produce COCCN1CCN(c2c(C(C)=O)cc(Cl)c3cncn23)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.