Using COc1ccc([Mg]Br)cc1, CCOC(=O)c1cncnc1C(=O)OCC to produce CCOC(=O)c1cncnc1C(=O)c1ccc(OC)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.