Using C1CCNC1, O=C(O)CC1CCN(CCc2ccccc2N2CCCCC2=O)C1 to produce O=C(CC1CCN(CCc2ccccc2N2CCCCC2=O)C1)N1CCCC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.