Using CCNCC, O=C(O)CCC(=O)Nc1ccc(C(=O)N2CCCCc3ccccc32)cc1 to produce CCN(CC)C(=O)CCC(=O)Nc1ccc(C(=O)N2CCCCc3ccccc32)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.