Using O=C1CCc2[nH]c3ccccc3c21, O=CC1CCN(Cc2ccccc2)CC1 to produce O=C1C(=CC2CCN(Cc3ccccc3)CC2)Cc2[nH]c3ccccc3c21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.