Metabolite Detection is important to doc drug use in medical and forensic options, and phase I metabolites of isotonitazene and metonitazene are identified in reliable cases of consumption (Krotulski et al. 2020, 2021). Having said that, the main target was on reporting isotonitazene and metonitazene concentrations, and stage II metabolites https://chemicalglobe.com/product-tag/protonitazene-for-sale-uk/