EPIMERS

作品数：13被引量：19H指数：2
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相关领域：理学更多>>
相关机构：北京大学更多>>
相关期刊：《Chinese Journal of Natural Medicines》《Science China Chemistry》《Science Bulletin》《Journal of Chinese Pharmaceutical Sciences》更多>>
相关基金：国家自然科学基金王宽诚敎育基金更多>>
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Isolation and characterization of three pairs of verrucosidin epimers from the marine sediment‑derived fungus Penicillium cyclopium and confguration revision of penicyrone A and related analogues被引量：1
《Marine Life Science & Technology》2023年第2期223-231,共9页Yan-He Li Attila Mándi Hong-Lei Li Xiao-Ming Li Xin Li Ling-Hong Meng Sui-Qun Yang Xiao-Shan Shi Tibor Kurtán Bin-Gui Wang 
Financial support by programs from the National Natural Science Foundation of China(U2006203);from the Senior User Project of RV KEXUE(KEXUE2020GZ02)is gratefully acknowledged.B.-G.W.appreciates the support of the RV KEXUE of the National Major Science and Technology Infrastructure from the Chinese Academy of Sciences(for sampling);The research work of the Hungarian authors was supported by the National Research,Development,and Innovation Ofce(K138672,FK134653).The Governmental Information-Technology Development Agency(KIFÜ)is acknowledged for CPU time。
Verrucosidins,a methylatedα-pyrone class of polyketides rarely reported upon,have been implicated in one or more neurological diseases.Despite the signifcance of verrucosidins as neurotoxins,the absolute confguration...
关键词：Marine-derived fungus Penicillium cyclopium Verrucosidin derivatives TDDFT-ECD calculations Mosher’s method Antimicrobial activity 
Pestaloamides A and B,two spiro-heterocyclic alkaloid epimers from the plant endophytic fungus Pestalotiopsis sp.HS30被引量：1
《Science China Chemistry》2020年第9期1208-1213,共6页Xiao-Zheng Su Yi-Ying Zhu Jian-Wei Tang Kun Hu Xiao-Nian Li Han-Dong Sun Yan Li Pema-Tenzin Puno 
the Second Tibetan Plateau Scientific Expedition and Research(STEP)Program(2019QZKK0502);the National Natural Science Foundation of China(81874298);the CAS“Light of West China”Program(Pema-Tenzin Puno);the Yunnan Science Fund for Distinguished Young Scholars(2019FJ002)。
Pestaloamides A and B(1 and 2),two novel alkaloids featuring an unprecedented spiro[imidazothiazoledione-alkylidenecyclopentenone]scaffold,were obtained from the cultures of an endophytic fungus Pestalotiopsis sp.HS30...
关键词：ALKALOIDS endophytic fungus structure elucidation tumor immunotherapy 
A pair of new tirucallane triterpenoid epimers from the stems of Picrasma quassioides被引量：1
《Chinese Journal of Natural Medicines》2019年第12期906-911,共6页ZHANG JieD WANG Chuan-XiD SONG Xiao-Jun LI Shuang ZHAO Huan CHEN Guo-Dong HU Dan GAO Hao YAO Xin-Sheng 
supported by grants from the National Key Research and Development Program of China(Nos.2018YFA0903200 and 2018YFA0903201);the National Natural Science Foundation of China(No.31761143016);Chang Jiang Scholars Program(GAO Hao,2017)from the Ministry of Education of China;National High-level Personnel of Special Support Program(No.2017RA2259);Guangdong Special Support Program(No.2016TX03R280);Young Elite Scientists Sponsorship Program by China Association of Chinese Medicine(No.QNRC2-B06);Guangdong Province Universities and Colleges Pearl River Scholar Funded Scheme(GAO Hao,2014);Local Innovative and Research Teams Project of Guangdong Pearl River Talents Program(No.2017BT01Y036);K.C.Wong Education Foundation(GAO Hao,2016)
A pair of new tirucallane triterpenoid epimers,picraquassins M and N(1 and 2),were isolated from the stems of Picrasma quassioides(D.Don)Benn.Their structures were determined based on comprehensive spectroscopic and X...
关键词：Tirucallane triterpenoid EPIMERS Picrasma quassioides AChE inhibitory activity CYTOTOXICITY Antimicrobial activity 
A pair of cyclopeptide epimers from the seeds of Celosia argentea被引量：3
《Chinese Journal of Natural Medicines》2018年第1期63-69,共7页LIU Feng-Jie ZHU Zhi-Hua JIANG Yan LI Hui-Jun 
financially supported by the National Natural Science Foundation of China(Nos.81322051 and 31400300);the Natural Science Foundation of Jiangsu Province(No.BK20151442);the Project Funded by the Priority Academic Program Development(PAPD) of Jiangsu Higher Education Institutions
Two cyclopeptides, celogentin L(1) and its epimer lyciumin A(2) were firstly isolated from Celosia argentea L.. The planar structures of the two compounds were fully determined by spectroscopic data, including 1 D-, 2...
关键词：Celosia argentea CYCLOPEPTIDES Lyciumin A Celogentin L Absolute configuration 
The blood-brain barrier permeability of 20(S) and 20(R)-protopanaxatriol epimers and dammar-20(22)E,24-diene-3β,6α,12β-triol in MDCK-pHa MDR cell monolayer model被引量：1
《Journal of Chinese Pharmaceutical Sciences》2017年第8期566-573,共8页郑怡然 吴秀稳 杨秀伟 
The National New Drug R&D Program(Grant No.2011BAI07B08;2009ZX09301-010)of China
The blood-brain barrier permeability of 20（S） and 20（R）-protopanaxatriol epimers and dammar-20（22）E,24-diene- 313,6α,12β-triol were investigated using the MDCK-pHaMDR cell monolayer model. The bidirectional pe...
关键词：20（S）-Protopanaxatriol 20（R）-Protopanaxatriol Dammar-20（22）E 24-diene-3β 6α 12β-triol MDCK-pHaMDR Permeability Blood-brain barrier 
Semisynthesis and Cytotoxicity Evaluation of a Series of Ocotillol Type Saponins and Aglycones from 20（S）-Ginsenoside Rg2, Rhl, Protopanaxatriol and Their 20（R）-Epimers
《Chemical Research in Chinese Universities》2016年第1期35-40,共6页YANG Jie YU Xue CAI Xiaoxiang CHEN Yanxin ZANG Huiming LI Xuwen JIN Yongri 
Supported by the National Natural Science Foundation of China（No.31201295）.
Abstract With the oxidation treatment, eighteen compounds were separated from 20（S）-ginsenoside Rg2, Rhl, pro- topanaxatriol（PPT） and their 20（R）-epimers in total and cytotoxicity of most of them was evaluated a...
关键词：SEMISYNTHESIS Ocotillol SAPONIN Cytotoxicity 
An easy route to exotic 9-epimers of 9-amino-(9-deoxy) cinchona alkaloids with(8S,9R) and(8R,9S)-configurations through two inversions of configuration
《Chinese Chemical Letters》2014年第4期557-560,共4页Jing-Wei Wan Xue-Bing Ma Rong-Xing He Ming Li 
Research support from the National Science Foundation ofChina(No.21071116);Chongqing Scientific Foundation,China(No.2010BB4126)
Four exotic chiral organocatalysts, 9-amino-（9-deoxy） cinchona alkaloids with （8S, 9R） and （8R, 9S）- configurations, were conveniently synthesized for the first time in 27-72% total yields through two conversion...
关键词：Cinchona alkaloids 9-Amino-（9-deoxy） cinchona alkaloids Synthesis Inversion of configuration 
Determination of Tetracyclines and Their Epimers in Agricultural Soil Fertilized with Swine Manure by Ultra-High-Performance Liquid Chromatography Tandem Mass Spectrometry被引量：10
《Journal of Integrative Agriculture》2012年第7期1189-1198,共10页ZHENG Wen-li ZHANG Li-fang ZHANG Ke-yu WANG Xiao-yang XUE Fei-qun 
A rapid, sensitive and specific ultra-high-performance liquid chromatography tandem mass spectrometry （UPLC-MS） method was developed for the analysis of tetracycline antibiotics, including tetracycline （TC）, oxyte...
关键词：TETRACYCLINES EPIMERS ultra performance liquid chromatography SOIL solid phase extraction 
Synthesis of 5-Substituted-3-[(2’R,4’R)-4’-Hydroxy-2’-hydroxymethyltetrahydrofuran-4’-yl]-1,2,4-oxadiazoles and Their Epimers
《Chemical Research in Chinese Universities》2001年第4期407-414,共8页WU Wei-dong MA Ling-tai ZHANG Li-he 
National Natural Science Foundation of China.
The syntheses of 5-substituted-3-[( 2’ R, 4’ R)-4 ’ -hydroxy-2 ’ -hydroxymethyltetra-hydrofuran-4’ -yl]D-1 ,2, 4-oxadiazoles and their epimers were accomplished with the aid of th construction of 1,2, 4-oxadiazol...
关键词：Nucleoside analogue 1 2 4-Oxadiazole Transacylation 
A Pair of Dimeric Stilbene Epimers from Gnetum Montanum被引量：2
《Chinese Chemical Letters》1998年第11期0-0,0,共3页Hao CHEN Mao LIN (Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, 1 Xian Nong Tan Street, Beijing 100050) 
A pair of dimeric stilbenes, gnetifolin M and gnetifolin N were isolated from the lianas of Gnetum montanum. All attempts to separate them by HPLC were unsuccessful. Their str-uctures were elucidated by the spectrosco...
关键词：Gnetum montanum  gnetacea  stilbene gnetifolins M  N. 
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