Metabolite Detection is essential to doc drug usage in medical and forensic configurations, and phase I metabolites of isotonitazene and metonitazene are identified in genuine conditions of consumption (Krotulski et al. 2020, 2021). On the other hand, the main focus was on reporting isotonitazene and metonitazene concentrations, and section II https://chemicalglobe.com/product-tag/protonitazene-for-sale/