Using COC[C@H](C)Oc1cc(Oc2cnc(S(C)(=O)=O)cn2)cc(-c2ccc(C3=NC(O)[C@H](C)O3)[nH]2)c1 to produce C[C@@H]1OC(c2ccc(-c3cc(Oc4cnc(S(C)(=O)=O)cn4)cc(O[C@@H](C)CO)c3)[nH]2)=NC1O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.