Using O=c1[nH]ccc2oc3ccc(-c4cccnc4)cc3c(=O)c12, C[Mg]Br to produce C=C1c2cc(-c3cccnc3)ccc2Oc2cc[nH]c(=O)c21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.