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Uchiyama N, Kikura-Hanajiri R, Ogata J, Goda Y. 
“Chemical analysis of synthetic cannabinoids as designer drugs in herbal products”. 
Forensic Sci Int. 2010 May 26;198(1-3):31-8.
Several synthetic cannabinoids were found in 44 of 46 different kinds of herbal products that are currently distributed on the illegal drug market in Japan due to their expected narcotic effects. Gas chromatography-mass spectrometry GC-MS and liquid chromatography-mass spectrometry LC-MS analyses indicated that most of the products contained two major synthetic cannabinoids: 1RS,3SR-3-[2-hydroxy-4-2-methylnonan-2-ylphenyl]cyclohexan-1-ol, renamed cannabicyclohexanol with the agreement of Pfizer Inc., and/or 1-naphthalenyl1-pentyl-1H-indol-3-ylmethanone, named JWH-018. Oleamide cis-9,10-octadecenoamide, which is an endogenous cannabinoid, was also detected in 7 products. Additionally, two synthetic cannabinoids were identified as minor components in some products. One was 1RS,3SR-3-[2-hydroxy-4-2-methyloctan-2-ylphenyl]cyclohexan-1-ol, which is named CP-47,497 and is a homolog of cannabicyclohexanol. The other was 1-naphthalenyl1-butyl-1H-indol-3-ylmethanone, which is named JWH-073 and is a homolog of JWH-018. These compounds were reported as synthetic cannabinoids possessing pharmacological cannabimimetic activity. The concentrations of cannabicyclohexanol, JWH-018 and oleamide in the products ranged from 1.1 to 16.9mg/g, 2.0 to 35.9mg/g and 7.6 to 210.9mg/g, respectively, and showed considerable variation. In this study, details of the analysis and identification of these synthetic cannabinoids in herbal products being sold on the Japanese drug market are described.
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