Using COC(C)(C)OC, OC[C@@H]1C[C@@H](n2ccc3c(Sc4ccccc4)ncnc32)[C@H](O)[C@@H]1O to produce CC1(C)O[C@@H]2[C@H](CO)C[C@@H](n3ccc4c(Sc5ccccc5)ncnc43)[C@@H]2O1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.