Using CC(Br)c1ccccc1, CC(C)(C)OC(=O)N1CCNC(=O)C1 to produce CC(c1ccccc1)N1CCN(C(=O)OC(C)(C)C)CC1=O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.