Using CN1CCN(c2cccc3c2C[C@H](N)CC3)CC1, O=C(O)c1ccc(N2CCOCC2)cc1 to produce CN1CCN(c2cccc3c2C[C@H](NC(=O)c2ccc(N4CCOCC4)cc2)CC3)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.