Using C[Mg+], CC(=O)c1ccc(-c2cc3nc(Oc4ccc(C)c(C(=O)O)c4)[nH]c3cc2Cl)cc1 to produce Cc1ccc(Oc2nc3cc(-c4ccc(C(C)(C)O)cc4)c(Cl)cc3[nH]2)cc1C(=O)O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.