Using CSc1nncc(-c2ccc(F)c(Br)c2)n1, CCCC[Sn](CCCC)(CCCC)c1ccccn1 to produce Fc1ccc(-c2cnnc(-c3ccccn3)n2)cc1-c1ccccn1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.