Using CC(=O)C(C)(C)C, COC(=O)c1ccc2cc(C(=O)OC)ccc2c1 to produce CC(C)(C)C(=O)CC(=O)c1ccc2cc(C(=O)CC(=O)C(C)(C)C)ccc2c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.