Using O=C(O)c1cc(Br)cc2c1CCC2=O, CC(C)(C)OC(=O)CN to produce CC(C)(C)OC(=O)CNC(=O)c1cc(Br)cc2c1CCC2=O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.