RCS-4 is a synthetic cannabinoid which has been detected in herbal mixtures. RCS-4 M11 metabolite is a major urinary metabolite of RCS-4. It is derived by O-demethylation and oxidation of the N-pentyl chain to a ketone on the parent compound. This metabolite is potentially useful as a metabolic marker for the identification of RCS-4 ingestion and is intended for research and forensic purposes.
