Using O=C(Nc1ccc(N2CCN(Cc3ccccc3)CC2)cc1)c1ccccc1-c1ccccc1 to produce O=C(Nc1ccc(N2CCNCC2)cc1)c1ccccc1-c1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.