Using CC(C)[N+](=O)[O-], CCOC(=O)c1cnn(C(C)(C)C)c1CBr to produce CCOC(=O)c1cnn(C(C)(C)C)c1C=O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.