Using Brc1ccc2cnc(Nc3ccc(N4CCOCC4)cc3)nn12, Sc1ccccc1 to produce c1ccc(Sc2ccc3cnc(Nc4ccc(N5CCOCC5)cc4)nn23)cc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.