Using CC(C)(C)OC(=O)CBr, O=C1CCNC(=O)CCN1 to produce CC(C)(C)OC(=O)CN1CCC(=O)N(CC(=O)OC(C)(C)C)CCC1=O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.