Using CN1CCN(c2cccc3ccc(NC(=O)c4ccccc4)cc23)CC1 to produce O=C(Nc1ccc2cccc(N3CCNCC3)c2c1)c1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.