Using COC(=O)Cc1ccc(C)cc1, O=C(O)CCCCNC(=O)OCc1ccccc1 to produce COC(=O)C(C(=O)CCCCNC(=O)OCc1ccccc1)c1ccc(C)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.