Using COc1cc2c(cc1OC)C1CC(=O)C(CC(C)C)CN1CC2 to produce COc1cc2c(cc1OC)[C@H]1C[C@@H](O)[C@H](CC(C)C)CN1CC2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.