Using COC(=O)c1ccc(O)cc1C(=O)OC, BrCCCOc1ccccc1 to produce COC(=O)c1ccc(OCCCOc2ccccc2)cc1C(=O)OC, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.