Using O=[N+]([O-])c1cc(Br)ccc1OCc1ccccc1, C=C[Sn](CCCC)(CCCC)CCCC to produce C=Cc1ccc(OCc2ccccc2)c([N+](=O)[O-])c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.