Using O=C1NC(=O)c2ccccc21, CC(C)(C)OC(=O)n1ccc2c(Cl)c(CBr)ccc21 to produce CC(C)(C)OC(=O)n1ccc2c(Cl)c(CN3C(=O)c4ccccc4C3=O)ccc21, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.