Using CS(=O)(=O)Cl, CCOC(=O)Cn1c(Cl)cnc(N[C@@H]2CN(C(=O)OC(C)(C)C)C[C@H]2c2ccccn2)c1=O to produce CCOC(=O)Cn1c(Cl)cnc(N[C@@H]2CN(S(C)(=O)=O)C[C@H]2c2ccccn2)c1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.