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Sesquiterpenes from Carpesium longifolium

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Sesquiterpenes from Carpesium longifolium

A New Eudesmanoilde from Carpesium macrocephalum

第三届全国有机化学学术会议

作者： yang, chao yuan, cheng-shan jia, zhong-jian (State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000)

＜正＞ The genus Carpesium （Compositae） with only 21 species is widely distributed in Asia, mainly in the southwestern mountainous regions of China. The seeds, roots, leaves and stems of some Carpesium species have long been used as Chinese traditional medicine for hemostatic, vermifuge, anti-inflammatory and detoxication properties. Here, we report the first phytochemical investigation of Carpesium longifolium Chen et C. M. Hu, which led to the

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Chinese Chemical Letters 2002年第9期13卷 855-856页

作者： chao yang cheng shan yuan Yi Feng HAN zhong jian jia Department of Chemistry Lanzhou UniversityLanzhou 730000

A new eudesmanoilde was isolated from the aerial parts of Carpesium macrocephalum. Its structure was elucidated as 2?acetoxy-11酘-eudesma-4-en-12, 8?olide by spectral methods.

关键词： Carpesium macrocephalum Compositae eudesmanolide.

Two New Antibacterial Iridoids from Patrinia rupestris

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Chinese Chemical Letters 2006年第3期17卷 337-340页

作者： Xiu Ping yang cheng shan yuan zhong jian jia State Key Laboratory of Applied Organic Chemistry College of Chemistry and Chemical Engineering Lanzhou University Lanzhou 730000

Two new iridoids （1 and 2） were isolated from the roots of Patrinia rupestris （Pail.） Juss. Their structures were elucidated by spectroscopic methods. Compounds 1 and 2 exhibited strong antibacterial activities ag... 详细信息

关键词： Patrinia rupestris Valerianaceae iridoids antibacterial activity.

A New Sesquiterpene from Saussurea parviflora

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Chinese Chemical Letters 2002年第8期13卷 752-753页

作者： zhong Duo yang Shuo LI cheng shan yuan zhong jian jia Department of Chemistry National Laboratory of Applied Organic chemistryLanzhou University Lanzhou 730000

A new sesquiterpene: 11,12,13-trihydroxy-4(15),7(8)-eudesmdien-9-one was isolated from Saussurea parviflora. The structure was elucidated on the basis of spectral evidence.

关键词： Composite Saussurea parviflora eudesmane sesquiterpene.

Two New Sesquiterpenes from Ligularia veitchiana

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Chinese Chemical Letters 2002年第11期13卷 1069-1070页

作者： Ying WANG cheng shan yuan Yi Feng HAN zhong jian jia Department of Chemistry National Laboratory of Applied Organic ChemistryLanzhou UniversityLanzhou 730000

A new furanoeremophilane and a new eudesmane were isolated from the roots of Ligularia veitchiana. Their structures were elucidated as 1b, 10b-epoxy-6b-isobutyryloxy-9-oxo-furanoeremophilane and 8a-hydroxy-4 (15), 11... 详细信息

关键词： Ligularia veitchiana Compositae furanoeremophilane eudesmane.

A New Sesquiterpene and a New Norsesquiterpene from Cacalia deltophylla

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Chinese Chemical Letters 2003年第8期14卷 818-819页

作者： Ying WANG cheng shan yuan Xiao Long WANG zhong jian jia Department of Chemistry National Laboratory of Applied Organic ChemistryLanzhou UniversityLanzhou 730000

A new sesquiterpene and a new norsesquiterpene were isolated from the whole plant of Cacalia deltophylla (Maxim) Mattf. Their structures were elucidated as deltocacalone (1) and deltonorcacalol (2) by spectroscopic m... 详细信息

关键词： Cacalia deltophylla Compositae cacalone cacalol.

Two New Eremophilenolides from Cacalia ainsliaeflora

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Chinese Chemical Letters 2003年第5期14卷 479-482页

作者： Man Jun MAO cheng shan yuan Chuan Zong ZOU zhong jian jia Department of Chemistry National Laboratory of Applied Organic ChemistryLanzhou UniversityLanzhou 730000

Two new eremophilenolides (3b-angeloyloxy-8b, 10b-dihydroxy-6b-ethoxyeremophile- nolide (1) and 3b, 6b-diangeloyloxy-8a-methoxy-10a-hydroxyeremophilenolide (2) were isolated from the roots of Cacalia ainsliaeflora. T... 详细信息

关键词： Cacalia ainsliaeflora Compositae eremophiane sesquiterpene.

Beam dynamics,RF measurement,and commissioning of a CW heavy ion IH-DTL

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Nuclear Science and Techniques 2018年第3期29卷 143-155页

作者： Heng Du You-Jin yuan zhong-shan Li Zhi-Jun Wang Peng Jin Xiao-Ni Li Guo-Zhu Cai Wen-Wen Ge Guo-Feng Qu yuan He jia-Wen Xia jian-cheng yang Xue-Jun Yin Institute of Modern Physics Chinese Academy of SciencesLanzhou 730000China University of Chinese Academy of Sciences Beijing 100049China

A 53.667 MHz CW(continuous-wave) heavy ion IH-DTL has been designed for the SSC-LINAC injector of HIRFL-CSR(Heavy Ions Research Facility at Lanzhou-Cooling Storage Ring). It accelerates ions with maximum mass-to-charge ratio of 7.0 from 143 to 295 ke V/u. Low-power RF measurement of the IH-DTL1 has been taken to investigate the RF performance and the quality of the electric field distribution on the beam *** measured Q_0 value and the shunt impedance are 10,400 and 198 MX/m, respectively. The electric field distributions on and around the beam axis were evaluated and compared with the design value. By a new approach,the dipole field component is also estimated. The beam dynamics simulation using measured field distribution was presented in this paper. Based on the dynamics analysis in both transverse and longitudinal phase space, the field distribution can meet the design requirement. Finally, the RF conditioning and very first beam commissioning on the IH-DTL1 were finished. The beam test results agree well with the simulation results; what's more, the property of the variable output beam energy about the separated functions DTL was verified.

关键词： Linac RF measurement Beam dynamic simulation Commissioning

Fast-bunching design of compact heavy ion RFQ linac

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Nuclear Science and Techniques 2018年第12期29卷 81-88页

作者： Ke-Dong Wang You-Jin yuan Xue-Jun Yin jian-cheng yang Heng Du zhong-shan Li Xiao-Ni Li He Zhao Zi-Qiang Dong Jie Liu jia-Wen Xia Institute of Modern Physics Chinese Academy of SciencesLanzhou 730000 China University of Chinese Academy of Sciences Beijing 100049China Huizhou Research Center of Ion Science Huizhou 516003China

We propose the construction of a compact linac as the injector of a cancer therapy facility at the Institute of Modern Physics(IMP) of the Chinese Academy of Sciences(CAS). Based on a traditional setup, a new compact fast-bunching design is first introduced to optimize the 600 keV/u RFQ with a 0.05 pm A ^(12)C^(4+) beam. This shortens the RFQ structure length from the standard design value of272–230 cm while effectively regulating the particle loss and emittance growth. In addition, a detailed error analysis was performed after the optimization process. The error sources cover input beam parameters errors, machining errors and alignment errors. The simulation results show that the beam loss and emittance growth of the RFQ are acceptable and within typical ranges of error.

关键词：线性加速器设计价值 RFQ 重离子单位面积优化过程中国科学院现代物理