Using ClCCCBr, COc1cc2c(Oc3ccc(C)cc3C(=O)c3ccccc3)ccnc2cc1O to produce COc1cc2c(Oc3ccc(C)cc3C(=O)c3ccccc3)ccnc2cc1OCCCCl, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.