Using CS(=O)(=O)Cl, CCOC(=O)c1cc(NC)c(C)nc1C(=O)OCC to produce CCOC(=O)c1cc(N(C)S(C)(=O)=O)c(C)nc1C(=O)OCC, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.