Using CNC(=O)c1cc(Cl)ccn1, Oc1ccc2oc(Nc3ccc(Br)cc3)nc2c1 to produce CNC(=O)c1cc(Oc2ccc3oc(Nc4ccc(Br)cc4)nc3c2)ccn1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.