Using COc1ccc2c(c1)CCC(Br)C2=O, CCOC(=O)C(C)C(=O)OCC to produce CCOC(=O)C(C)(C(=O)OCC)C1CCc2cc(OC)ccc2C1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.