Using [N-]=[N+]=[N-], CCC1(CCCBr)C(=O)NC(=O)NC1=O to produce CCC1(CCCN=[N+]=[N-])C(=O)NC(=O)NC1=O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.