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- W4383105187 abstract "Eighteen previously unreported pregnane glycosides, namely marsdenosides S1-S18, along with 15 known analogues, have been isolated from the stems of Marsdenia tenacissima. The structures of the undescribed compounds were elucidated by spectroscopic means, and their absolute configurations were established on the basis of time-dependent density functional theory (TD-DFT) based electronic circular dichroism (ECD) calculation, X-ray crystallography and acid hydrolysis. All the isolates were evaluated for their chemo-reversal ability against P-glycoprotein (P-gp)-mediated multidrug resistance (MDR) in MCF-7/ADR cell line, and nine ones displayed moderate MDR reversal activity with reversal folds in the range of 2.45-9.01. The most active 12-O-acetyl-20-O-benzoyl-(14,17,18-orthoacetate)-dihydrosarcostin-3-O-β-d-thevetopyranosyl-(1 → 4)-O-β-d-oleandropyranosyl-(1 → 4)-O-β-d-cymaropyranoside increased the sensitivity of MCF-7/ADR cell to adriamycin comparably to the reference drug verapamil (RF = 8.93)." @default.
- W4383105187 created "2023-07-05" @default.
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- W4383105187 date "2023-09-01" @default.
- W4383105187 modified "2023-10-06" @default.
- W4383105187 title "Pregnane steroid glycosides with multidrug resistance reversal activity from the stems of Marsdenia tenacissima" @default.
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- W4383105187 doi "https://doi.org/10.1016/j.phytochem.2023.113787" @default.
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