Using COC1c2c(OS(C)(=O)=O)c(C=O)cc(I)c2C(=O)N1C(C)(C)c1ccccc1, COC(OC)OC to produce COC(OC)c1cc(I)c2c(c1OS(C)(=O)=O)C(OC)N(C(C)(C)c1ccccc1)C2=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.