A pair of novel phenylethanol glycosides from Cistanche tubulosa (Schenk) Wight.
Fitoterapia
; 160: 105227, 2022 Jul.
Article
en En
| MEDLINE
| ID: mdl-35662650
ABSTRACT
A pair of differential epimers with opposite C-7 configurations, crenatosides A and B (1 and 2), and 10 known phenylethanoid glycosides (PhGs) (3-12) were obtained from the succulent stem of Cistanche tubulosa. The structures were elucidated based on extensive spectral data (UV, IR, 1D and 2D NMR, HR-ESIMS), which are first reported natural products with unique glycoside structures. After acid hydrolysis, the configuration of the sugar was determined by comparing it with the normative sugar by HPLC. The absolute configurations of both compounds were determined by ECD spectrum analysis. All the obtained compounds were examined for their inhibitory effect on lipopolysaccharide (LPS)-induced nitric oxide (NO) production in mouse microglial cells (BV-2 cells), and compounds 1 and 2 showed potent inhibition on NO production with IC50 values of 5.62 µM and 6.30 µM, respectively.
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Bases de datos:
MEDLINE
Asunto principal:
Alcohol Feniletílico
/
Cistanche
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En
Revista:
Fitoterapia
Año:
2022
Tipo del documento:
Article