Using ClCCCCBr, COc1ccc(NC(=O)Nc2ccc(Oc3ccnc4cc(O)c(C#N)cc34)cc2)cc1 to produce COc1ccc(NC(=O)Nc2ccc(Oc3ccnc4cc(OCCCCCl)c(C#N)cc34)cc2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.