Using C=C[Mg]Br, CCCn1cc(Cc2ccc(C(=O)OC)cc2OC)c2cc(C=O)ccc21 to produce C=CC(O)c1ccc2c(c1)c(Cc1ccc(C(=O)OC)cc1OC)cn2CCC, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.