Using CC1(C)OC(=O)c2cc(Br)c(OCc3ccccc3)cc2O1, O=C([O-])[O-] to produce CCOc1cc(OCc2ccccc2)c(Br)cc1C(=O)OC, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.