Using CC1(C)OC2CCC(n3cnc4cc(Cl)c(Cl)cc43)CC2O1 to produce O[C@@H]1CC[C@@H](n2cnc3cc(Cl)c(Cl)cc32)C[C@@H]1O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.