Using COc1nn(C(c2ccccc2)(c2ccccc2)c2ccccc2)c2cc(NC(=O)N[C@H](C)c3ccccc3)nc(C=O)c12, C[Mg]Br to produce COc1n[nH]c2cc(NC(=O)N[C@H](C)c3ccccc3)nc(C(C)O)c12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.