Metabolite Detection is critical to document drug intake in medical and forensic configurations, and stage I metabolites of isotonitazene and metonitazene are identified in reliable situations of consumption (Krotulski et al. 2020, 2021). However, the main target was on reporting isotonitazene and metonitazene concentrations, and stage II metabolites weren't investigated. https://chemicalglobe.com/shop/uncategorized/protonitazene-for-sale/