Abstract
Two new iridoid glycosides, named williamsoside C (1) and williamsoside D (2) were isolated from the root barks of Sambucus williamsii Hance. Their structures were established on the basis of extensive spectroscopic analysis (1D, 2D NMR and HRESIMS) and chemical studies as α-D-glucopyranosyl (1→2)-β-D-fructofuranosyl (4→6)-β-morroniside (1) and 7β-O-ethyl morroniside-(6′-O-7′′)-β-morroniside (2), respectively.
Highlights
Sambucus williamsii Hance is a deciduous shrub or small tree widely distributed in China [1] and used for centuries for the treatment of inflammation [2] and bone fractures and joint diseases [3]
We investigated fraction of the root barks of
We present the isolation and structural characterization of the two new iridoid morronisides on the basis of the interpretation of their spectral data, including 1D, 2D NMR
Summary
Sambucus williamsii Hance is a deciduous shrub or small tree widely distributed in China [1] and used for centuries for the treatment of inflammation [2] and bone fractures and joint diseases [3]. The chemical composition of S. williamsii has been extensively studied. We investigated fraction of the root barks of. S. williamsii obtained from a macroporous resin by elution with 50% ethanol. Our extraction and separation method can greatly enrich fractions in iridoid compounds so trace iridoids can be isolated. We present the isolation and structural characterization of the two new iridoid morronisides (in Figure 1) on the basis of the interpretation of their spectral data, including 1D, 2D NMR and HRESIMS data
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