Abstract
Biotransformation of α-artemether and dihydroartemisinin (DHA) by Glycyrrhiza glabra (Linn.), Lavandula officinalis (L.), and Panax quinquefolium was investigated. Two metabolites: tetrahydrofuran derivative (3) and a 13-carbon ring-rearranged product (4) were produced from α-artemether (1). DHA (2) provided metabolite 4. The structure of the metabolites were characterized by proton (1H) and carbon (13C) nuclear magnetic resonance (NMR) imaging, fourier transform infrared spectroscopy, and mass spectroscopy. This is the first report that G. glabra and L. officinalis have the capability to biotransform α-artemether, and P. quinquefolium to biotransform DHA. Metabolite 3 is a new compound and metabolite 4 is reported here for the first time from artemisinin derivatives 1 and 2. The presence of acetate function in the derivative 3 and hydroxyl and C-12 deoxo groups in 4 obtained in our study make them interesting synthones for further modification into new clinically potent molecules.
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We wish to thank Director CIMAP, Lucknow, for providing the necessary facilities and constant encouragement to carry out this study. The work was carried out under a major laboratory project (MLP-02) on “Exploration of bioactive molecules from Natural sources and value addition through semi-synthetic approach.”
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Gaur, R., Patel, S., Verma, R.K. et al. Biotransformation of artemisinin derivatives by Glycyrrhiza glabra, Lavandula officinalis, and Panax quinquefolium . Med Chem Res 23, 1202–1206 (2014). https://doi.org/10.1007/s00044-013-0726-x
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DOI: https://doi.org/10.1007/s00044-013-0726-x