Using [N-]=[N+]=[N-], Cc1cc2c(cc1C)C(=O)C(Br)=CC2=O to produce Cc1cc2c(cc1C)C(=O)C(N=[N+]=[N-])=CC2=O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.