Using O=C[O-], Cc1cc(C(=O)O)cc2c1Oc1c(Cl)cc(N)cc1CS2(=O)=O to produce Cc1cc(C(=O)O)cc2c1Oc1c(Cl)cc(NC=O)cc1CS2(=O)=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.