Using CC(C)(C)OC(=O)CN1CCNCCN(CC(=O)OC(C)(C)C)CCN(CC(=O)OC(C)(C)C)CC1, COC(=O)CBr to produce COC(=O)CN1CCN(CC(=O)OC(C)(C)C)CCN(CC(=O)OC(C)(C)C)CCN(CC(=O)OC(C)(C)C)CC1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.