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A New Monoterpene Glycoside from Swertia punicea

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Chinese Chemical Letters 2000年第8期11卷 709-710页

作者： Xin ming ming hua qiu Rui Lin NIE Guo Lin ZHANG Kunming Institute of Botany Chinese Academy of SciencesKunming 650204 Chengdu Institute of Biology Chinese Academy of SciencesChengdu 610041

A new monoterpene glycoside, 2,6-dimethyl-2E,6E-octadienoic acid 1,6'-lactone 8-beta-D-glucopyranoside, was isolated from Swertia punicea, accompanying with six known compounds 1-O-primeverosyl-3,7-dimethoxy-8-hydroxyxanthone, 1-O-primeverosyl-3,7,8-tri-methoxyxan-thone, epi-eustomoside, 1-hydroxy-3,7,8-trimethoxyxanthone, 1,8-dihydroxy-3,7-dimethoxy xanthone and isovitexine. Their structures were elucidated based on spectral evidence.

关键词： Swertia punicea monoterpene glycoside xanthone epi-eustomoside isovitexine

A new monoterpenoid indole alkaloid from Rauvolfia yunnanensis

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Chinese Chemical Letters 2009年第10期20卷 1221-1223页

作者： Bao Hui Cheng Jian Chao Chen ming hua qiu a State Key Laboratory of Phytochemistry and Plant Resources in West China Kunming Institute of Botany Chinese Academy of Sciences Kunming 650204 China Graduate School of Chinese Academy of Sciences Beijing 100039 China

One new monoterpenoid indole alkaloid, l l-methoxyburnamine-17-O-3′,4′,5′-trimethoxybenzoate （1）, was isolated from Rauvolfia yunnanensis Tsiang. Its structure was identified by speclroscopic evidences.

关键词： Rauvolfia yunnanensis Monoterpenoid indole alkaloid Akuammiline-type rnonoterpenoid indole alkaloid

A New Disaccharide from the Fern Macrothelypteris digophlebia

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Chinese Chemical Letters 2000年第12期11卷 1063-1064页

作者： ming hua qiu Jin ming GAO Hu Qi LIU Jian Xi FU Kunming Institute of Botany The Chinese Academy of SciencesKunming 650204 Northwest Sci.&Tech.University of Agriculture and Forestry YanglingShaanxi 712100

A new disaccharide, digobiose 1, was isolated from the rhizomes of Macrothelypteris digophlebia (Bak.) Ching var. elegans (koidz.). Its structure which is very similar with that of sucrose was identified as alpha -D-g... 详细信息

关键词： Macrothelypteris digophlebia Disaccharide digobiose.

Progress on the Chemical Constituents Derived from Glucosinolates in Maca(Lepidium meyenii)

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Natural Products and Bioprospecting 2018年第6期8卷 405-412页

作者： Yan-Jie huang Xing-Rong Peng ming-hua qiu State Key Laboratory of Phytochemistry and Plant Resources in West China Kunming Institute of BotanyChinese Academy of SciencesKunming 650201YunnanChina Yunnan Key Laboratory of Natural Medicinal Chemistry Kunming Institute of BotanyChinese Academy of SciencesKunming 650201YunnanChina University of Chinese Academy of Sciences Beijing 100049People’s Republic of China

Maca(Lepidium meyenii Walp.),a famous food supplement,has drawn an unprecedented international interest over the last two *** was assumed that glucosinolates,macamides,macaenes,and alkaloids are the main bioactive components of Maca ***,a series of novel thiohydantoins which generally exhibit a variety of activities have been isolated from *** review focuses on the progress on the main bioactive components of Maca and their biosynthetic pathway,which indicates that macamides,thiohydantoins,and some alkaloids may originate from ***,thiohydantoins from Maca are the first type of thiohydantoin derivatives to be found from a natural source and may contribute to some significant effects of Maca.

关键词： Maca(Lepidium meyenii Walp.) Chemical constituents Thiohydantoins Biosynthetic pathway

Lepithiohydimerins A-D:Four Pairs of Neuroprotective Thiohydantoin Dimers Bearing a Disulfide Bond from Maca(Lepidium meyenii Walp.)

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Chinese Journal of Chemistry 2021年第10期39卷 2738-2744页

作者： Xing-Rong Peng Ran-Ran Zhang Jun-Hong Liu Zhong-Rong Li Lin Zhou ming-hua qiu State Key Laboratory of Phytochemistry and Plant Resources in West China Kunming Institute of BotanyChinese Academy of SciencesKunmingYunnan650201 China University of the Chinese Academy of Sciences Beijing 100049China

Main observation and conclusion An HPLC-UV-guided separation was performed and four pairs of unprecedented macathiohydantoin dimers,lepithiohydimerins A—D(1—4)bearing a rare disulfide bond were isolated from the tubers of *** structures were unambiguously confirmed by NMR spectroscopic,X-ray crystallographic and electronic circular dichroism(ECD)*** the concentration of 20μmol/L,compounds 2-1,2-2,and 4-1 increased the viability of PC12 cells with the cell viability at(72.06±1.14)%,(72.64±1.49)%,and(70.93±1.22)%,***,the serial concentration experiment showed that they can protect PC12 cells in a dose-dependent manner.

关键词： Lepidium meyenii Walp. Thiohydantoin dimers Natural products Structure elucidation Biological activity

Buried interface management via bifunctional NH_(4)BF_(4)towards efficient CsPbI_(2)Br solar cells with a V_(oc)over 1.4 V

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Journal of Energy Chemistry 2024年第2期89卷 364-370,I0009页

作者： Fazheng qiu ming-hua Li Jinpeng Wu Jin-Song Hu School of Materials Science and Engineering NingboTech UniversityNingbo 315100ZhejiangChina Beijing National Laboratory for Molecular Sciences(BNLMS) Institute of ChemistryChinese Academy of SciencesBeijing 100190China College of Chemical Engineering Beijing Advanced Innovation Center for Soft Matter Science and EngineeringBeijing University of Chemical TechnologyBeijing 100029China School of Chemical Sciences University of Chinese Academy of SciencesBeijing 100049China

CsPbI_(2)Br perovskite solar cells(PSCs)have drawn tremendous attention due to their suitable bandgap,excellent photothermal stability,and great potential as an ideal candidate for top cells in tandem solar ***,the abundant defects at the buried interface and perovskite layer induce severe charge recombination,resulting in the open-circuit voltage(V_(oc))output and stability much lower than ***,a novel buried interface management strategy is developed to regulate interfacial carrier dynamics and CsPbI_(2)Br defects by introducing ammonium tetrafluoroborate(NH_(4)BF_(4)),thereby resulting in both high CsPbI_(2)Br crystallization and minimized interfacial energy ***,NH_(4)^(+)ions could preferentially heal hydroxyl groups on the SnO_(2)surface and balance energy level alignment between SnO_(2)and CsPbI_(2)Br,enhancing charge transport efficiency,while BF_(4)^(-)anions as a quasi-halogen regulate crystal growth of CsPbI_(2)Br,thus reducing perovskite ***,it is proved that eliminating hydroxyl groups at the buried interface enhances the iodide migration activation energy of CsPbI_(2)Br for strengthening the phase *** a result,the optimized CsPbI_(2)Br PSCs realize a remarkable efficiency of 17.09%and an ultrahigh V_(oc)output of 1.43 V,which is one of the highest values for CsPbI_(2)Br PSCs.

关键词： Inorganic perovskite Buried interface Defect Stability Open-circuit voltage loss

Applanoids A—E as the First Examples of C-15/C-20 Michael Adducts in Ganoderma Triterpenoids and Their PXR Agonistic Activity

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Chinese Journal of Chemistry 2022年第22期40卷 2633-2641页

作者： Hai-Guo Su Hang-Fei Liang Gui-Lin Hu Lin Zhou Xing-Rong Peng Hui-Chang Bi ming-hua qiu Guangdong Provincial Key Laboratory of New Drug Design and Evaluation School of Pharmaceutical SciencesSun Yat-sen UniversityGuangzhouGuangdong510006China State Key Laboratory of Phytochemistry and Plant Resources in West China Kunming Institute of BotanyChinese Academy of SciencesKunmingYunnan 650201China NMPA Key Laboratory for Research and Evaluation of Drug Metabolism&Guangdong Provincial Key Laboratory of New Drug Screening School of Pharmaceutical SciencesSouthern Medical UniversityGuangzhouGuangdong 510515China

Ganoderma triterpenoids(GTs),a class of major active constituents of Ganoderma fungi,possess diverse structures and remarkable *** the present study,nine new GTs,namely applanoids A—I(1—9),were isolated from the medicinal fungus of Ganoderma *** structures including absolute configurations were established by comprehensive spectroscopic analyses and ECD *** A—E(1—5)represent the first example of GTs with 6/6/5/6/5 pentacyclic system and the formation of the ether ring between C-15 and C-20 involves Michael addition ***,compounds 1—8 were evaluated for their human pregnane X receptor(hPXR)agonistic activity using dual-luciferase reporter gene assay,and the results showed that compounds 1,2 and 4 can dose-dependently activate *** investigation further illustrated the structural diversity of GTs and provided new insights for searching PXR agonists from GTs.

关键词： Ganoderma applanatum Lanostane triterpenoids Michael adducts Structure elucidation Pregnane X receptor

Four undescribed pyrethrins from seeds of Pyrethrum cinerariifolium and their aphidicidal activity

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Natural Products and Bioprospecting 2023年第1期13卷 528-536页

作者： Hao-Ran Zhou Li-Wu Lin Zhong-Rong Li Xing-Rong Peng ming-hua qiu State Key Laboratory of Phytochemistry and Plant Resources in West China Kunming Institute of BotanyChinese Academy of SciencesKunming 650201People’s Republic of China University of Chinese Academy of Sciences Beijing 100049People’s Republic of China

Four undescribed pyrethrins C-F(1-4)as well as four known pyrethrins(5-8)were isolated from seeds of Pyrethrum cinerariifolium *** structures of compounds 1-4 were elucidated by UV,HRESIMS,and NMR(^(1)H and ^(13)C NMR,^(1)H-^(1)H COSY,HSQC,HMBC and ROESY),among which the stereostructure of compound 4 was determined by calcu-lated ***,compounds 1-4 were evaluated for their aphidicidal *** insecticidal assay results showed that 1-4 exhibited moderate aphidicidal activities at the concentration of 0.1 mg/mL with the 24 h mortality rates ranging from 10.58 to 52.98%.Among them,pyrethrin D(2)showed the highest aphidicidal activity,with the 24 h mortality rate of 52.98%,which was slightly lower than the positive control(pyrethrin II,83.52%).

关键词： Pyrethrum cinerariifolium Pyrethrins Aphidicidal activity

New Dammarane Triterpenoids,Caffruones A–D,from the Cherries of Coffea arabica

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Natural Products and Bioprospecting 2018年第6期8卷 413-418页

作者： Xia Wang Xing-Rong Peng Jing Lu Gui-Lin Hu ming-hua qiu State Key Laboratory of Phytochemistry and Plant Resources in West China Kunming Institute of BotanyChinese Academy of SciencesKunming 650201People’s Republic of China University of the Chinese Academy of Sciences Beijing 100049People’s Republic of China

In present study,four new dammarane-type triterpenoids,namely caffruones A–D(1–4),were isolated from the cherries of Coffea *** structures were elucidated by extensive spectroscopic analysis including 1D,2D NMR(HSQC,HMBC,^(1)H–^(1)H COSY,and ROESY),HRMS and IR *** is the first time that tetracyclic triterpenes have been reported in genus Coffea.

关键词： Coffea arabica Cherries Triterpenoids Structural elucidation