Using COC(=O)C(C)Oc1cccc(OCc2ccc3ccc(Br)cc3n2)c1 to produce CC(Oc1cccc(OCc2ccc3ccc(Br)cc3n2)c1)C(=O)O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.