Using COC1(N)N=C([C@@H]2O[C@H](CO)[C@@H](O)[C@@H]2F)N=C2N=CN=C21, O=C([O-])O to produce COC1(N)N=C([C@@H]2O[C@H](C(O)C(=O)O)[C@@H](O)[C@@H]2F)N=C2N=CN=C21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.