Using CCCCI, CCOC(=O)C(CC(C)C(=O)OCc1ccccc1)C(=O)OCC to produce CCCCC(CC(C)C(=O)OCc1ccccc1)(C(=O)OCC)C(=O)OCC, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.