Using O=C(n1ccnc1)n1ccnc1, Oc1ccc(Br)cc1-c1cc2ccccc2[nH]1 to produce O=c1oc2ccc(Br)cc2c2cc3ccccc3n12, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.