Using COC(=O)CCC(=O)c1ccc(NC(=O)c2ccc(C)cc2)cc1 to produce Cc1ccc(C(=O)Nc2ccc(C(=O)CCC(=O)O)cc2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.