Using CS(=O)(=O)Cl, COC(=O)c1ccc(Oc2ccc(CC(=O)OC(C)(C)C)cc2CN)cc1 to produce COC(=O)c1ccc(Oc2ccc(CC(=O)OC(C)(C)C)cc2CNS(C)(=O)=O)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.