Lizhen Xu

A NEW STILBENOID FROM ARUNDINA GRAMINIFOLIA

A chemical investigation of the Orchidaceae Arundina gramnifolia has led to the isolation of a novel stilbenoid, named arundinan (1). The structure of 1 has been elucidated as 2-(p-hydroxybenzyl)-3-hydroxy-5-methoxybibenzyl on the basis of physical and chemical evidence and spectral analysis.

One new benzyldihydrophenanthrene from Arundina graminifolia.

A novel benzyldihydrophenanthrene named arundinaol (1) has been isolated from the rhizoma of Arundina graminifolia. The structure of 1 has been elucidated as 7-hydroxy-1-(p-hydroxybenzyl)-2,4-dimethoxy-9,10-dihydrophenanthrene on the basis of physical and chemical evidence and spectral analysis.

Flavonol glycosides from Lysimachia capillipes

Two new compounds, capilliposide I and capilliposide II, together with a known compound quercetin-3- O -(2,6-di- f - l -rhamnopyranosyl)- g - d -galactopyranoside were isolated from the extracts of the whole herbs of Lysimachia capillipes . Their structures were established through their spectral data and chemical properties.

Effects of season, variety, and processing method on ellagic acid content in pomegranate leaves

Abstract Ellagic acid (EA) has aroused great interest worldwide owing to its antioxidant, anti-inflammatory, and anticarcinogenetic properties. The EA content in pomegranate leaf was measured in this study using high performance liquid chromatography to investigate the effects of season, variety, and processing method on the EA level. The results show that the EA content in 11 varieties of pomegranate from the Zaozhuang region in China range from 1.30 mg · g−1 to 6.46 mg · g−1 of dry weight in five consecutive seasons from June to October. An analysis of variance (ANOVA) shows that the EA content is significantly dependent on the season (p

A new minor triterpene saponin from kaixin-san prescription

A new minor oleanane-type saponin, ginsenoside-ROA (1), has been isolated from the extract of Kaixin-San, a prescription composed of Panax ginseng and other medicinal herbs, together with 15 known ginsenosides. The structure of 1 was established as 3-O-β-d-glucopyranosyl-(1→2)-β-d-glucuronopyranosyl oleanolic acid 28-O-β-d-glucopyranosyl-(1→6)-β-d-glucopyranoside by chemical and spectroscopic evidence. In addition, the presence of ginsenoside-ROA in ginseng was confirmed by HPLC-ESI-MS.

New xanthone glycosides from Securidaca inappendiculata

Three new xanthone glycosides, securixanside A ( 1 ), securixanside B ( 2 ), and securixanside C ( 3 ) were isolated from the stems of Securidaca inappendiculata . These compounds were characterized by spectrometric and chemical methods, including FABMS and one- and two-dimensional NMR experiments.