Using C=Cc1ccc(S(=O)(=O)N2CCN(NC3CCN(c4ccncc4)CC3)C(=O)C2)cc1, C=O to produce C=Cc1ccc(S(=O)(=O)N2CCN(N(C)C3CCN(c4ccncc4)CC3)C(=O)C2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.