Using Nc1cccc(-c2nnco2)c1, O=C(O)c1cc(Br)ccn1 to produce O=C(Nc1cccc(-c2nnco2)c1)c1cc(Br)ccn1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.