Qitai Zheng

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A novel ll,20: 1,20-diepoxy-ent-kaurane diterpenoid, maoyecrystal 1 (1), was isolated from Isodan japonicus, and its structure was elucidated by spectroscopic methods and comparison with another new ent-kauranoid, rubescensin W (2) from Isodon rubescens var. taihangensis. The structure of 2 was determined by single crystal X-ray diffraction analysis. A(More)
OBJECTIVE To establish a new identification and analysis method of Chinese medicinal materia Ligesticum chuanxiong Hort. METHODS Powder X-ray diffraction Fourier pattern. RESULTS Experiments and analysis were carried out on five samples. The standard X-ray diffraction Fourier pattern and characteristic diffraction peaks of Ligesticum chuanxiong Hort.(More)
Dibothrioclinin I and II, namely (+)-(11R,12S,25R,27S)- and (+/-)-(11RS,12RS,25RS,27SR)-3,3,7,17,21-pentamethyl-4,12,18,26-tetraoxaheptacyclo[15.11.1.0(2,15).0(5,14).0(6,11).0(19,28).0(20,25)]nonacosa-5(14),6,8,10,19(28),20,22,24-octaene-13,27-dione, respectively, are C(30)H(28)O(6) epimers which are derived from two bothrioclinin moieties joined so as to(More)
OBJECTIVE To develop a new identification and analysis method of Chinese medicinal materia Radix Rehmanniae Preparata. METHODS Powder X-ray Diffraction Fourier Pattern. RESULTS Experiments and analysis were carried out on five samples. The standard X-ray diffraction Fourier Pattern and characteristic diffraction peaks of Radix Rehmanniae Preparata were(More)
OBJECTIVE To develop a new identification and analysis method of Chinese medicinal material Radix Angelicae Sinenesis. METHODS Powder X-ray Diffraction Fourier Fingerpring pattern. RESULTS Experiments and analysis were carried out on five samples. The standard X-ray diffraction Fourier pattern and characteristic diffraction peaks of Radix Angelicae(More)
Three new minor labdane diterpene glycosides, forskoditerpenoside C, D, and E (1-3), and a novel labdane diterpene forskoditerpene A (4) were isolated from the ethanol extract of the whole plant of Coleus forskohlii. Their structures and relative stereochemistry were elucidated on the basis of extensive spectroscopic analyses including 1D-, 2D-NMR, and(More)
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