Using C1COCCO1, O=C1Cc2cccc(S(=O)(=O)c3ccc(Cl)cc3)c2N1 to produce Nc1c(CC(=O)O)cccc1S(=O)(=O)c1ccc(Cl)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.