Using CSC, Fc1ccc(Br)cc1N=C(c1ccccc1)c1ccccc1 to produce CSc1ccc(F)c(N=C(c2ccccc2)c2ccccc2)c1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.