Using Oc1nc(-c2cncnc2)nc2cccc(Br)c12, NCc1ccccn1 to produce Brc1cccc2nc(-c3cncnc3)nc(NCc3ccccn3)c12, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.