Using CCC=O, Clc1ccc(N2CCCCn3c2nc2cccc(Br)c23)c(Cl)c1 to produce CCC(O)c1cccc2nc3n(c12)CCCCN3c1ccc(Cl)cc1Cl, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.