rifamycin antibiotic nitroimidazole antibiotic TNP-2198 antibiotic_resistance PubChem:136014272 TNP-2198 is an experimental rifamycin-nitroimidazole conjugate currently in development for treatment of several bacterial infections. It exhibits greater activity than rifamycin and nitroimidazole antibiotics administered together and is effective against bacteria resistant to both drug classes. ARO:3007176 ChEMBL:CHEMBL5314439