Using COC(=O)c1c2c3c(cc(Cl)cc3n1S(=O)(=O)c1ccccc1)CCC2CC(=O)Nc1ccccc1 to produce O=C(CC1CCc2cc(Cl)cc3[nH]c(C(=O)O)c1c23)Nc1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.