CAS 2196180-19-3 appears in our catalog under these names: Metronidazole-hydroxy D2, D2-Metronidazole-hydroxy, Concentration: 100 µg/ml Solvent: Methanol, D2-Metronidazole-hydroxy, Hydroxymetronidazole-d2. Offered by: Dr. Ehrenstorfer, HPC Standards, MedChemExpress. Available pack sizes: 10mg, 1x1ml, 1x10mg, 1 mg.