Using CCOC1O[C@@H]2[C@@H](CO)C[C@@H](n3cnc4c(Cl)ncnc43)[C@@H]2O1, COC(C)(C)OC to produce CC1(C)O[C@@H]2[C@@H](CO)C[C@@H](n3cnc4c(Cl)ncnc43)[C@@H]2O1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.