Using O=C1CN(S(=O)(=O)c2ccc3cc(Cl)ccc3c2)CCN1NC1CCN(c2ccncc2)CC1, C=O to produce CN(C1CCN(c2ccncc2)CC1)N1CCN(S(=O)(=O)c2ccc3cc(Cl)ccc3c2)CC1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.