Using CC(C)(C)OC(=O)N1CCNCC1, CC(=O)Nc1ccc(CCBr)cc1 to produce CC(=O)Nc1ccc(CCN2CCN(C(=O)OC(C)(C)C)CC2)cc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.