Using CCCC(=O)CC(=O)OCC, Cc1cc(CBr)ccc1-c1ccccc1C#N to produce CCCC(=O)C(Cc1ccc(-c2ccccc2C#N)c(C)c1)C(=O)OCC, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.