Using O=C1NC(=O)c2ccccc21, COc1cc(Br)ccc1C(=O)CBr to produce COc1cc(Br)ccc1C(=O)CN1C(=O)c2ccccc2C1=O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.