Using CC(C)(C)OC(=O)N1CCC(Cc2cnn(C(C)(C)C)c2Br)(N=C=O)CC1 to produce CC(C)(C)OC(=O)N1CCC2(CC1)Cc1cnn(C(C)(C)C)c1C(=O)N2, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.