Using CC(C)(C)CO, CC1(C)CC(C)(C)c2cc(Br)cc(C(=O)O)c2O1 to produce CC(C)(C)COC(=O)c1cc(Br)cc2c1OC(C)(C)CC2(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.