Structure elucidation of olasubscorpioside C, a new rotameric biflavonoid glycoside from the stem barks of Olax subscorpioidea (Oliv)

Magn Reson Chem. 2023 Aug;61(8):497-503. doi: 10.1002/mrc.5375. Epub 2023 Jun 21.ABSTRACTFrom the n-butanol soluble fraction of the ethanol extract of the medicinal plant Olax subscorpioidea, a previously unreported rotameric biflavonoid glycoside constituted of 4'-O-methylgallocatechin-(4α → 8)-4'-O-methylgallocatechin as aglycone named olasubscorpioside C (1) along with the known 4'-O-methylgallocatechin (2) were isolated. Their structures were determined on the basis of spectrometric and spectroscopic techniques including HRFABMS, 1 H and 13 C NMR, DEPT 135o , HSQC, HMBC, ROESY, and CD followed by comparison with the reported data.PMID:37340817 | DOI:10.1002/mrc.5375

Source: Magnetic Resonance in Chemistry : MRC - June 21, 2023 Category: Chemistry Authors: Bienvenu Tsakem Billy Tchegnitegni Toussie Xavier Siwe-Noundou Beaudelaire Kemvoufo Ponou R émy Bertrand Teponno Syed Ghulam Musharraf Leon Azefack Tapondjou Source Type: research