Using Nc1cc(N)nc(N2CCOCC2)n1, O=C(CBr)c1ccccc1 to produce Nc1cc2nc(-c3ccccc3)cn2c(N2CCOCC2)n1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.