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Oleanane-Type Triterpene Glycosides from Camellia phanii and Their α-Glucosidase Inhibitory Activity.

Hoang Thi Tuyet LanVu Thi XuanBui Thi Mai AnhNguyen Thi MaiNguyen Viet DungBui Huu TaiNguyen Thi Minh HangVu Mai ThaoNguyen Xuan Nhiem
Published in: Chemistry & biodiversity (2024)
Three new oleanane-type triterpene saponins, named camphanosides A-C (1-3), along with five known compounds, chikusetsusaponin IVa (4), spinasaponin A 28-O-glucoside (5), (-)-epicatechin (6), (-)-epicatechin 3-O-gallate (7), and (-)-epigallocatechin 3-O-gallate (8) were isolated from the leaves Camellia phanii Hakoda & Ninh. Their structures were established by 1D and 2D-NMR and mass spectral analysis and chemical methods. Moreover, compounds 1-5 were also evaluated for α-glucosidase inhibitory activity. Compounds 1-3 exhibited moderate α-glucosidase inhibitory activity with IC 50 values of 230.7±18.0, 251.4±22.7, and 421.4±25.6 μM, respectively.
Keyphrases
  • molecular docking
  • high resolution
  • magnetic resonance
  • optical coherence tomography
  • high intensity
  • mass spectrometry
  • dual energy