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Toward the identification of a phytocannabinoid-like compound in the flowers of a South African medicinal plant (Leonotis leonurus)

Authors
  • Hunter, E.1
  • Stander, M.1
  • Kossmann, J.1
  • Chakraborty, S.2
  • Prince, S.2
  • Peters, S.1
  • Loedolff, Bianke1
  • 1 Stellenbosch University, Stellenbosch, South Africa , Stellenbosch (South Africa)
  • 2 University of Cape Town, Cape Town, South Africa , Cape Town (South Africa)
Type
Published Article
Journal
BMC Research Notes
Publisher
Springer (Biomed Central Ltd.)
Publication Date
Nov 10, 2020
Volume
13
Issue
1
Identifiers
DOI: 10.1186/s13104-020-05372-z
Source
Springer Nature
Keywords
License
Green

Abstract

ObjectiveCurrent global trends on natural therapeutics suggest an increasing market interest toward the use and discovery of new plant-derived therapeutic compounds, often referred to as traditional medicine (TM). The Cannabis industry is currently one such focal area receiving attention, owing to the occurrence of phytocannabinoids (pCBs) which have shown promise in health-promotion and disease prevention. However, the occurrence of pCBs in other plant species are often overlooked and rarely studied. Leonotis leonurus (L.) R. Br. is endemic to South Africa with a rich history of use in TM practices amongst indigenous people and, has been recorded to induce mild psychoactive effects akin to Cannabis. While the leaves have been well-reported to contain therapeutic phytochemicals, little information exists on the flowers. Consequently, as part of a larger research venture, we targeted the flowers of L. leonurus for the identification of potential pCB or pCB-like compounds.ResultsFlower extracts were separated and analyzed using high performance thin layer chromatography (HPTLC). A single pCB candidate was isolated from HPTLC plates and, using liquid chromatography coupled to tandem mass spectrometry (LC–MS/MS), we could successfully group this compound as a fatty amide and tentatively identified as 7,10,13,16-Docosatetraenoylethanolamine (adrenoyl-EA), a known bioactive compound.

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