Using C1CCC2=NCCCN2CC1, O=C1CCc2c(Br)cc([N+](=O)[O-])c(O)c21 to produce COc1c([N+](=O)[O-])cc(Br)c2c1C(=O)CC2, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.