Using Cc1csc(Nc2ncc(Br)cc2OCc2ccccc2)n1, OB(O)/C=C/c1ccccc1 to produce Cc1csc(Nc2ncc(/C=C/c3ccccc3)cc2OCc2ccccc2)n1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.