Using BrCCCOc1ccc(-c2ccccc2)cc1, COC(=O)C(Cc1cccc(O)c1)OC to produce COC(Cc1cccc(OCCCOc2ccc(-c3ccccc3)cc2)c1)C(=O)O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.