Using OB(O)c1cccnc1, O=Cc1nn(C2CCCCO2)c2ncc(Br)cc12 to produce O=Cc1nn(C2CCCCO2)c2ncc(-c3cccnc3)cc12, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.