Using OB(O)c1ccc2ccccc2c1, CN1c2ccc(Br)cc2Sc2cc(Br)ccc21 to produce CN1c2ccc(-c3ccc4ccccc4c3)cc2Sc2cc(-c3ccc4ccccc4c3)ccc21, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.