Background:

RCS-4-d₉(exempt preparation) is intended for use as an internal standard for the quantification of RCS-4 by GC- or LC-MS. RCS-4 is structurally similar to known synthetic cannabinoids. It has been found in several herbal incense products.¹RCS-4 is regulated as a Schedule I compound in the United States. RCS-4-d₉(exempt preparation) is provided as a DEA exempt preparation. This product is intended for research and forensic applications.

1.Kikura-Hanajiri, R., Uchiyama, N., and Goda, Y.Survey of current trends in the abuse of psychotropic substances and plants in JapanLeg. Med. (Tokyo)13(3)109-115(2011)