Using O=C1c2ccccc2C(=O)N1CCN1CCC(NC(c2ccccc2)c2ccccc2)CC1 to produce NCCN1CCC(NC(c2ccccc2)c2ccccc2)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.