Dong-yan Liu

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OBJECTIVE To study the chemical constituents of the dichloromethane extracted from pine needles of Cedrus deodara. METHODS Compounds were isolated and purified from the dichloromethane extract of pine needles by chromatography on silica gel and Sephadex LH-20. Their structures were identified on the basis of spectroscopic analysis and physicochemical(More)
OBJECTIVE To study the chemical constituents of the dichloromethane extract from pine needles of Cedrus deodara. METHODS The chemical constituents were isolated and purified from the dichloromethane extract of pine needles by chromatography on silica gel and Sephadex LH-20. Their structures were elucidated by analysis of spectral data and chemical(More)
OBJECTIVE To study the chemical constituents from pine needles of Cedrus deodara. METHODS Chemical constituents were isolated from 95% ethanol extract by silica gel and Sephadex LH-20 column chromatography. The structures were elucidated through spectroscopic analysis. RESULTS The compounds were identified as 10-nonacosanol (1), dibutyl phthalate (2),(More)
A new saponin, isonarthogenin 3-O-β-d-glucopyranosyl-(1→4)-β-d-galactopyranoside (1), together with twelve known compounds, were isolated from the rhizomes of Polygonatum sibiricum. The structures of these compounds were elucidated by analysis of their 1D/2D NMR and MS data. Among them, phenol compounds 4-7 and 9-10 showed significant inhibitions against(More)
OBJECTIVE To study the chemical constituents from Patrinia scabra Bunge. METHODS Chemical constituents were isolated and purified by silica gel and Sephadex LH-20 column chromatography. Their structures were elucidated on the basis of spectroscopic analysis and chemical evidence. RESULTS Seven compounds were isolated and purified. Their structures were(More)
Two new myricetin glycosides, myricetin-3-O-(6″-O-E-p-coumaroyl)-α-D-glucocopyranoside (1) and 3′,5′-di-O-methylmyricetin-3-O-(6″-O-acetyl)-α-D-glucopyranoside (2), and three known flavonoids, myricetin (3), cedrin (4), and 2R,3R-dihydromyricetin (5), were isolated from the pine needles of Cedrus deodara. Their structures were elucidated on the basis of(More)
There have been many reports about the anti-aging effect of traditional Chinese medicine (TCM), but the material basis and mechanism of action have not been clearly elucidated. AMP-activated protein kinase (AMPK) is the receptor of energy metabolism and its life extending effect has been confirmed in different experiments. Over expression or activation with(More)
Euphorbia helioscopia L. (Euphorbiaceae), a Chinese medicinal herb, is widely distributed in most parts of China [1]. Phytochemical studies show that Euphorbia helioscopia L. contains mainly terpenoids [2, 3], flavonoids [4, 5], and polyphenols [6], but few papers report the tannins, alkaloids, and lignans isolated from this plant. Previously, the high(More)
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