Using COC(=O)CCc1ccc(N(CCO)C(=O)Nc2ccc3c(c2)CCCC3=O)cc1 to produce COC(=O)CCc1ccc(N2CCN(c3ccc4c(c3)CCCC4=O)C2=O)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.