Abstract
The flowers of M. obovata were extracted with aqueous MeOH and fractionated into EtOAc, n-BuOH, and H2O fractination. Three alkyl glycosides were isolated from the EtOAc fraction through repeated silica gel and ODS column chromatography. The structures were identified to be 2-methylbutan-1-ol-β-D-galactopyranoside (1), 2-methylbutan-1-ol-β-D-glucopyranoside (2), and 2-methylpropan-1-ol-β-D-glucopyranoside (3) on the basis of spectroscopic analyses such as fast atom bombardment mass spectrometry, infrared spectroscopy, 1D nuclear magnetic resonance (NMR) (1H and 13C-NMR), and 2D NMR (gCOSY, gHSQC, and gHMBC). These compounds were isolated for the first time from the flower of M. obovata in this study.
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