Using CCCC(=O)CC(=O)OCC, CC(Br)c1ccc(-c2ccccc2C#N)cc1 to produce CCCC(=O)C(C(=O)OCC)C(C)c1ccc(-c2ccccc2C#N)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.