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Chemical Constituents from the Flower of Datura metel L.
Hai-xue Kuang,Bing-you Yang,Yong-gang Xia,Wei-sheng Feng 대한약학회 2008 Archives of Pharmacal Research Vol.31 No.9
Phytochemical investigation of the 50% ethanol eluate fraction of macroporous resin for the flower of Datura metel L. led to the isolation of a new compound named yangjinhualine A (1) and five known megastigmane sesquiterpenes through repeated silica gel and ODS column chromatography and semipreparative HPLC. The structures of these compounds were determined by spectroscopic methods, including 2D-NMR, ESI-MS, and HR-ESI-MS spectrometry as well as by comparison with published data. Five known megastigmane sesquiterpenes were also isolated from D. metel L. for the first time.
Lignan Constituents from Chloranthus japonicus Sieb
Hai-xue Kuang,Yong-gang Xia,Bing-you Yang,Qiu-hong Wang,Shao-wa Lü 대한약학회 2009 Archives of Pharmacal Research Vol.32 No.3
A new coumarinolignan glucoside named yinxiancaoside C, along with five known benzofuran lignans, have been isolated from the whole plant of Chloranthus japonicus Sieb. The structures of compounds 1-6 were elucidated by chemical and spectroscopic methods including 1DNMR, 2D-NMR, ESI-MS and HR-ESI-MS. Five known benzofuran lignans were firstly discovered in the Chloranthaceae. In addition, the cytotoxic activity of the isolated compounds against human hepatoma (Hepg-2), ovarian carcinoma (OV420), and breast cancer (MCF-7) cells was investigated by MTT method.
Baimantuoluosides D-G, Four New Withanolide Glucosides from the Flower of Datura metel L.
Bing-you Yang,Yong-gang Xia,Qiu-hong Wang,De-qiang Dou,Hai-xue Kuang 대한약학회 2010 Archives of Pharmacal Research Vol.33 No.8
In our search for bioactive anti-psoriasis compounds from the flower of Datura metel L, we isolated four new withanolide glucosides, baimantuoluosides D, E, F and G (1-4). The structures of the new compounds are (5α,6α,7β,22R)-5,6,7,27-tetrahydroxy-1-oxowitha-2,24-dien-27-O-β-D-glucopyranoside (1), (5α,6β,7α,22R)-5,6,7,27-tetrahydroxy-1-oxowitha-2,24-dien-27-O-β-D-glucopyranoside (2), (5α,6β,7α,12β,22R)-5,6,7,12,27-pentahydroxy-1-oxowitha-2,24-dien-27-O-β-D-glucopyranoside (3), and (5α,6β,22R)-5,6,27-trihydroxy-1-oxowitha-2,24-dien-27-O-β-D-glucopyranoside (4) on the basis of chemical and physicochemical evidence.