Using C[Mg+], COc1ccc(-n2nc(CCC(C)=O)cc2-c2ccc(Cl)cc2)cc1 to produce COc1ccc(-n2nc(CCC(C)(C)O)cc2-c2ccc(Cl)cc2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.