Journal
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
Volume 64, Issue 24, Pages 5079-5084Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.jafc.6b01596
Keywords
Leptospermum; manuka honey; biomarker; lepteridine; lumazine
Funding
- Callaghan Innovation Ltd.
- Comvita NZ Ltd.
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Manuka honey, made from the nectar of Leptospermum scoparium, has garnered scientific and economical interest due to its nonperoxide antibacterial activity. Biomarkers for genuine manuka honey are increasingly in demand due to the presence of counterfeit manuka honey. This work reports the identification of a compound previously unreported in manuka honey by HPLC, and determination of the structure of the as 3,6,7-trimethyllumazine using NMR, MS, IR, and UV/vis spectroscopy. This assignment was confirmed by total synthesis. The natural product, renamed lepteridine, was only observed in manuka honeys and could potentially serve as a biomarker for genuine manuka honey.
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