Using COC(=O)c1cccc(C(O)=CC(=O)c2cn(S(=O)(=O)c3ccccc3)c3ccc(Cl)cc23)c1 to produce O=C(O)c1cccc(C(O)=CC(=O)c2c[nH]c3ccc(Cl)cc23)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.