Using CN(C[C@H]1O[C@@H](n2cnc3c(N)ncnc32)[C@@H]2OC(C)(C)O[C@@H]21)C1CC(CCc2nc3cc(C4COC4)ccc3[nH]2)C1 to produce CN(C[C@H]1O[C@@H](n2cnc3c(N)ncnc32)[C@H](O)[C@@H]1O)C1CC(CCc2nc3cc(C4COC4)ccc3[nH]2)C1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.