Using CC(C)(C)OC(=O)N1CCNC(=O)C1, COC(=O)c1ccc(CBr)cc1 to produce COC(=O)c1ccc(CN2CCN(C(=O)OC(C)(C)C)CC2=O)cc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.