A new 9,19-cyclolanostane type arabinoside, 16,23;22,25-diepoxy-3β,22,23,24-tetrahydroxy-9,19-cyclolanostane-3-O-α-L-arabinopyranoside (1), together with two known compounds (2 and 3), was isolated from the aerial part of Astragalus grahamianus. The structures of these compounds were characterized and identified by 1D and 2D NMR spectroscopic techniques and HR-ESI-MS and by comparison of their spectral data with those reported in the literature. All these compounds are reported from this plant for the first time.
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Acknowledgment
The author S. A. Shameem is grateful to UGC, India for the award of a teacher fellowship under the Faculty Development Programme. The Directors of the Centre of Research for Development and the Centre with Potential of Excellence in Particular Areas (CPEPA) sanctioned by UGC, University of Kashmir are gratefully acknowledged for providing laboratory facilities and chemicals. The authors also thank AIRF, Jawaharlal Nehru University and SAIF, IIT Bombay for recording the NMR and mass spectra, respectively.
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Published in Khimiya Prirodnykh Soedinenii, No. 1, January–February, 2022, pp. 66–68.
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Shameem, S.A., Banday, A.H., Khan, K.Z. et al. A New Cycloartane Glycoside from the Aerial Part of Astragalus grahamianus. Chem Nat Compd 58, 71–74 (2022). https://doi.org/10.1007/s10600-022-03598-w
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DOI: https://doi.org/10.1007/s10600-022-03598-w