Using O, CCOC1=C(S(C)(=O)=O)C=CC(O)(Cc2c(Cl)ccnc2Cl)C1C to produce CCOc1c(S(C)(=O)=O)ccc(C(=O)c2c(Cl)ccnc2Cl)c1C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.