Using O=C1NC(=O)c2ccccc21, Cc1nc2cc(CBr)ccc2o1 to produce Cc1nc2cc(CN3C(=O)c4ccccc4C3=O)ccc2o1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.