Using CC(Br)C(=O)c1cc(C(C)(C)C)c(O)c(C(C)(C)C)c1, CCO to produce CCOC(C)C(=O)c1cc(C(C)(C)C)c(O)c(C(C)(C)C)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.