Using ClCCBr, COc1cc2c(Oc3cc4ccccc4nc3C(C)=O)ccnc2cc1O to produce COc1cc2c(Oc3cc4ccccc4nc3C(C)=O)ccnc2cc1OCCCl, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.