Using CC(=O)OCCBr, CCc1ccc(C(=C2CC(C)(C)CC(C)(C)C2)c2ccccc2)cc1O to produce CCOC(=O)COc1cc(C(=C2CC(C)(C)CC(C)(C)C2)c2ccccc2)ccc1C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.