Using CC1(C)CC(=O)Nc2c(Br)cc3c(c21)OC(CN=[N+]=[N-])C3 to produce CC1(C)CC(=O)Nc2c(Br)cc3c(c21)OC(CN)C3, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.