|Systematic (IUPAC) name|
|CAS Registry Number|
|Molecular mass||382.51 g/mol|
STS-135 (N-(adamantan-1-yl)-1-(5-fluoropentyl)-1H-indole-3-carboxamide, also called 5F-APICA) is a designer drug offered by online vendors as a cannabimimetic agent. The structure of STS-135 appears to utilise an understanding of structure-activity relationships within the indole class of cannabimimetics, although its design origins are unclear. STS-135 is the terminally-fluorinated analogue of SDB-001, just as AM-2201 is the terminally-fluorinated analogue of JWH-018, and XLR-11 is the terminally-fluorinated analogue of UR-144. STS-135 acts a potent cannabinoid receptor agonist in vitro, with an EC50 of 51 nM for human CB2 receptors, and 13 nM for human CB1 receptors. STS-135 produces bradycardia and hypothermia in rats at doses of 1-10 mg/kg, suggesting cannabinoid-like activity.
A forensic standard of STS-135 is available, and the compound has been posted on the Forendex website of potential drugs of abuse.
- Wilkinson, S. M.; Banister, S. D.; Kassiou, M. (2015). "Bioisosteric Fluorine in the Clandestine Design of Synthetic Cannabinoids". Australian Journal of Chemistry 68: 4. doi:10.1071/CH14198.
- Banister, S. D.; Stuart, J.; Kevin, R. C.; Edington, A.; Longworth, M.; Wilkinson, S. M.; Beinat, C.; Buchanan, A. S.; Hibbs, D. E.; Glass, M.; Connor, M.; McGregor, I. S.; Kassiou, M. (2015). "Effects of Bioisosteric Fluorine in Synthetic Cannabinoid Designer Drugs JWH-018, AM-2201, UR-144, XLR-11, PB-22, 5F-PB-22, APICA, and STS-135". ACS Chemical Neuroscience: 150508124201002. doi:10.1021/acschemneuro.5b00107.
- Southern Association of Forensic Scientists
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