Using COc1cc2c(cc1Br)CC(C)=NN=C2c1ccc([N+](=O)[O-])cc1 to produce COc1cc2c(cc1Br)CC(C)NN=C2c1ccc([N+](=O)[O-])cc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.