Metabolite Detection is critical to doc drug intake in clinical and forensic settings, and section I metabolites of isotonitazene and metonitazene happen to be determined in reliable conditions of use (Krotulski et al. 2020, 2021). Nevertheless, the main target was on reporting isotonitazene and metonitazene concentrations, and period II metabolites https://chemicalglobe.com/product-tag/protonitazene-for-sale/