Using C=C[Sn](CCCC)(CCCC)CCCC, Cc1cc(Br)ccc1-c1noc(-c2ccc(OC(C)C)c(C(F)(F)F)c2)n1 to produce C=Cc1ccc(-c2noc(-c3ccc(OC(C)C)c(C(F)(F)F)c3)n2)c(C)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.