Using COC[C@H](C)Oc1cc(Oc2cnc(S(C)(=O)=O)cn2)cc(-c2ccc(C(=O)OCc3ccccc3)[nH]2)c1 to produce COC[C@H](C)Oc1cc(Oc2cnc(S(C)(=O)=O)cn2)cc(-c2ccc(C(=O)O)[nH]2)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.