Using Cc1c(O)c([N+](=O)[O-])cc2c1CCN(C(=O)OC(C)(C)C)CC2, COC(=O)CBr to produce COC(=O)COc1c([N+](=O)[O-])cc2c(c1C)CCN(C(=O)OC(C)(C)C)CC2, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.