Using OC[C@H]1O[C@@H](n2cnc3c(Cl)ncnc32)[C@H](O)[C@@H]1O, COCCN to produce COCCNc1ncnc2c1ncn2[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.