Using C[Mg+], CO[C@H]1O[C@H](COCc2ccc(Cl)cc2Cl)[C@@H](OCc2ccc(Cl)cc2Cl)C1=O to produce CO[C@H]1O[C@H](COCc2ccc(Cl)cc2Cl)[C@@H](OCc2ccc(Cl)cc2Cl)[C@@]1(C)O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.