Using O=C(NC(=S)Nc1ccc2nc(NCCc3ccc(Br)cc3)sc2c1)c1ccccc1 to produce NC(=S)Nc1ccc2nc(NCCc3ccc(Br)cc3)sc2c1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.