Forensic Toxicology

, Volume 36, Issue 1, pp 170–177 | Cite as

Cannabimimetic activities of cumyl carboxamide-type synthetic cannabinoids

  • Akiko Asada
  • Takahiro Doi
  • Takaomi Tagami
  • Akihiro Takeda
  • Yuka Satsuki
  • Masami Kawaguchi
  • Akihiko Nakamura
  • Yoshiyuki Sawabe
Short Communication


1-Pentyl-N-(2-phenylpropan-2-yl)-1H-indazole-3-carboxamide (CUMYL-PINACA) is a carboxamide-type synthetic cannabinoid comprising a cumylamine moiety. Recently, the detection of CUMYL-PINACA and some analogs in illicit drug products has been reported by the European Monitoring Centre for Drugs and Drug Addiction. In this study, we synthesized seven cumyl carboxamide-type synthetic cannabinoids (CUMYL-PINACA, CUMYL-5F-PINACA, CUMYL-PICA, CUMYL-5F-PICA, CUMYL-THPINACA, CUMYL-BICA, and CUMYL-5F-P7AICA) and evaluated their activities as CB1 and CB2 receptor agonists. We also showed the analytical characterization of these compounds using gas chromatography–electron ionization-mass spectrometry. All of the evaluated compounds exhibited moderate to strong activities as agonists acting on both CB1 and CB2 receptors with EC50 values in the range of 8.1 × 10−10–7.8 × 10−7 mol/L for CB1 and from 2.5 × 10−10 to 9.1 × 10−6 mol/L for CB2. The EC50 data presented will be helpful to understand the effects of these compounds in the forensic cases. Furthermore, other new cumyl carboxamide-type synthetic cannabinoids, which will be potentially distributed in the future, will probably have the activities as agonists acting on both CB1 and CB2 receptors.


Synthetic cannabinoids Cumyl carboxamide-type Agonists acting on both CB1 and CB2 receptors EC50 values CUMYL-5F-PICA CUMYL-BICA 



This study was partly supported by JSPS KAKENHI Grant number JP25860475 and JP15K08834.

Compliance with ethical standards

Conflict of interest

There are no financial or other relations that could lead to a conflict of interest.

Ethical approval

This article does not contain any studies with human participants or animals performed by any of the authors.


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Copyright information

© Japanese Association of Forensic Toxicology and Springer Japan KK 2017

Authors and Affiliations

  1. 1.Osaka Institute of Public HealthOsakaJapan

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