Using CCNC(=O)Nc1nc2cc(-n3cc(C=O)nn3)cc(-c3ccccn3)c2s1, C[Mg]Br to produce CCNC(=O)Nc1nc2cc(-n3cc(C(C)O)nn3)cc(-c3ccccn3)c2s1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.