Using Nc1ncnc2c1nc(Br)n2[C@@H]1O[C@H](CO)[C@@H](O)[C@H]1O, NCCP(=O)([O-])[O-] to produce Nc1ncnc2c1nc(NCCP(=O)(O)O)n2[C@@H]1O[C@H](CO)[C@@H](O)[C@H]1O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.