Using OB(O)c1ccccc1Br, Nc1nc(N2CCOCC2)c2nc(Cl)ccc2n1 to produce Nc1nc(N2CCOCC2)c2nc(-c3ccccc3Br)ccc2n1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.