Using CCOC(=O)C1NCCc2oc3c(Cl)cc(S(=O)(=O)c4ccccc4)cc3c21 to produce O=S(=O)(c1ccccc1)c1cc(Cl)c2oc3c(c2c1)C(CO)NCC3, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.