Using C[Mg+], CC(=O)c1cnc2nnn(Cc3ccc4ncccc4c3)c2n1 to produce CC(C)(O)c1cnc2nnn(Cc3ccc4ncccc4c3)c2n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.