Abstract
To highlight the role of plants in traditional healing, the leaves and the stems of cultivated Triumfetta cordifolia were phytochemically studied yielding a new nor-ursane type (1), a new ceramide (2) and a new piperidinic ceramide derivative (3) named, respectively, 2α,19α-dihydroxy-3-oxo-23-nor-urs-12-en-28-oic acid, (2R)-2-hydroxy-N-[(2S,3S,4R,26E)-1,3,4-trihydroxy-26-triaconten-2-yl] tetradecanamide and (2R,8Z)-2-hydroxy-{(2S,3R,5R,6S)-3,5-dihydroxy-6-[(1E,5Z)-hexadeca-1,5-dienyl]-2-(β-d-glucopyranosyloxy)methyl piperidine-1-yl} tetracos-8-enamide (3). These were obtained together with lupeol (4), stigmasterol (5), 3-O-β-d-glucopyranoside of β-sitosterol (6), tormentic acid (7) from stems and heptadecanoic acid (8), β-carotene (9), oleanolic acid (10), and 24-hydroxytormentic acid (11) from leaves. The structures were determined on the basis of NMR data (1H-, 13C-, 2D-NMR analyses), mass spectrometry and confirmed by chemical transformations as well as comparison of spectral data with those reported in the literature. The FRAP method was used to evaluate the antioxidant activity of fractions collected from flash chromatography and isolated compounds. Among the fractions, four reduced FeIII-TPTZ to FeII-TPTZ while isolated pure compounds showed no activity.
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Abbreviations
- APT:
-
Attached proton test
- CC:
-
Column chromatography
- COSY:
-
Correlation spectroscopy
- FRAP:
-
Ferric reducing ability of plasma
- FT-IR:
-
Fourier transformed infra-red
- HMBC:
-
Heteronuclear multiple bond correlation
- HSQC:
-
Heteronuclear single quantum correlation
- HR-ESI-MS:
-
Higher resolution electrospray mass spectrometry
- LCB:
-
Long chain base
- MALDI-TOF-MS:
-
Matrix assisted laser desorption ionisation-time of flight-mass spectrometry
- NMR:
-
Nuclear magnetic resonance
- NOESY:
-
Nuclear overhauser effect spectroscopy
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Acknowledgments
L. P. Sandjo would like to thank EGIDE and SCAC (Service de Cooperation et d’Actions Culturelles: French Grant Government No. 607832K) for their financial support. I would also like to thank the LSMCL (Laboratoire de Spectrométrie de Masse et Chimie Laser) for the MALDI-TOF-MS analyses and Serge Schneider for the LC-MS analyses.
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Sandjo, L.P., Tchoukoua, A., Ntede, H.N. et al. New Nortriterpenoid and Ceramides From Stems and Leaves of Cultivated Triumfetta cordifolia A Rich (Tiliaceae). J Am Oil Chem Soc 87, 1167–1177 (2010). https://doi.org/10.1007/s11746-010-1584-z
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DOI: https://doi.org/10.1007/s11746-010-1584-z