Metabolite Detection is critical to document drug intake in scientific and forensic configurations, and stage I metabolites of isotonitazene and metonitazene are actually recognized in genuine cases of use (Krotulski et al. 2020, 2021). Having said that, the focus was on reporting isotonitazene and metonitazene concentrations, and section II metabolites https://chemicalglobe.com/product-tag/protonitazene-for-sale/