Using COc1ccc(F)c(F)c1COc1cc([N+](=O)[O-])c(Cl)cc1Br, C=CC[Sn](CCCC)(CCCC)CCCC to produce C=CCc1cc(Cl)c([N+](=O)[O-])cc1OCc1c(OC)ccc(F)c1F, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.