Using C[Mg+], O=C1CCCCC(NC(=O)N2CCN(c3ccnc4cc(Cl)ccc34)CC2)C1 to produce CC1(O)CCCCC(NC(=O)N2CCN(c3ccnc4cc(Cl)ccc34)CC2)C1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.