Using Cn1ccnc1S, Cc1cccc(Nc2ncnc3ccc(CBr)cc23)c1 to produce Cc1cccc(Nc2ncnc3ccc(CSc4nccn4C)cc23)c1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.