Using CSc1nc(/C=C/N(C)C)c(C#N)c(Nc2cccc(C)c2)n1 to produce CSc1nc(Nc2cccc(C)c2)c2c(Br)nccc2n1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.