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  1. Article ; Online: catena-Poly[[[pentaaquaeuropium(III)]-μ-5-sulfonatoisophthalato-κ4O1,O1′:O3,O3′] 4,4'-bipyridine N,N′-dioxide hemisolvate trihydrate]

    Ai-Zhi Wu / Seik Weng Ng

    Acta Crystallographica Section E, Vol 66, Iss 11, Pp m1433-m

    2010  Volume 1433

    Abstract: In the crystal structure of the title compound, {[Eu(C8H3O7S)(H2O)5]·0.5C10H8N2O2·3H2O}n, the EuIII coordination polymer displays a ribbon motif as the 5-sulfoisopthalate anion uses one of carboxyl –CO2 units to chelate to a Eu atom and the other to bind ...

    Abstract In the crystal structure of the title compound, {[Eu(C8H3O7S)(H2O)5]·0.5C10H8N2O2·3H2O}n, the EuIII coordination polymer displays a ribbon motif as the 5-sulfoisopthalate anion uses one of carboxyl –CO2 units to chelate to a Eu atom and the other to bind to other two Eu atoms; the sulfonyl –SO3 unit is not involved in coordination. Adjacent ribbons are linked by O—H.O hydrogen bonds, generating a three-dimensional network. The 4,4′-bipyridine-N,N′-dioxide molecule lies on an inversion centre and is hydrogen-bonded to the complex network. The coordination geometry of the Eu atom is a monocapped square antiprism.
    Keywords Chemistry ; QD1-999
    Language English
    Publishing date 2010-11-01T00:00:00Z
    Publisher International Union of Crystallography
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  2. Article ; Online: Bis{(1-methylimidazol-2-ylmethyl)[2-(2-pyridyl)ethyl]amine-κ3N,N′,N′′}zinc(II) bis(hexafluoridophosphate)

    Ai-Zhi Wu / Seik Weng Ng

    Acta Crystallographica Section E, Vol 65, Iss 11, Pp m1479-m

    2009  Volume 1479

    Abstract: Two tridentate N-heterocyclic ligands chelate the ZnII atom in the title compound, [Zn(C12H16N4)2](PF6)2, conferring a fac-octahedral geometry. The ZnII atom lies on a center of inversion. The cation is linked to the anion by an N—H.F hydrogen bond. ...

    Abstract Two tridentate N-heterocyclic ligands chelate the ZnII atom in the title compound, [Zn(C12H16N4)2](PF6)2, conferring a fac-octahedral geometry. The ZnII atom lies on a center of inversion. The cation is linked to the anion by an N—H.F hydrogen bond.
    Keywords Chemistry ; QD1-999
    Language English
    Publishing date 2009-11-01T00:00:00Z
    Publisher International Union of Crystallography
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  3. Article ; Online: Structure-activity Relationships of Antioxidant Activity in vitro about Flavonoids Isolated from Pyrethrum Tatsienense

    Chao-Zhan Lin / Chen-Chen Zhu / Min Hu / Ai-Zhi Wu / Bairu Zeren-dawa / Kangsa Suolang-qimei

    Journal of Intercultural Ethnopharmacology, Vol 3, Iss 3, Pp 123-

    2014  Volume 127

    Abstract: Pyrethrum tatsienense (Bur. et Franch.) Ling is mainly used to treat hepatitis, headaches, head injuries, ulcers, and wounds in Tibet. The aim of this study was to investigate the antioxidant activity of eleven flavonoids mainly revealing luteolin as ... ...

    Abstract Pyrethrum tatsienense (Bur. et Franch.) Ling is mainly used to treat hepatitis, headaches, head injuries, ulcers, and wounds in Tibet. The aim of this study was to investigate the antioxidant activity of eleven flavonoids mainly revealing luteolin as mother nucleus isolated from Pyrethrum tatsienense, and further elaborate the structure-activity relationships of antioxidant activity about these flavonoids. The above study would provide some theoretical basis for the obvious therapeutic effects of this Chinese medicine. [J Intercult Ethnopharmacol 2014; 3(3.000): 123-127]
    Keywords Pyrethrum tatsienense; flavonoids; antioxidant activity; structure-activity relationship ; Therapeutics. Pharmacology ; RM1-950 ; Medicine ; R
    Language English
    Publishing date 2014-06-01T00:00:00Z
    Publisher SAGEYA Publishing Company
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  4. Article: Diterpenoid alkaloids and flavonoids from Delphinium trichophorum

    Lin, Chao-Zhan / Ai-Zhi Wu / Chen-Chen Zhu / Ju-Hua Mao / Si-Min Xie / Suolang-qimei Kangsa / Tian-Qin Xiong / Xiao-Hui Li / Zeren-dawa Bairi / Zhong-Xiang Zhao / Zhu Dun

    Phytochemistry. 2014 Jan., v. 97

    2014  

    Abstract: Five hetisane-type C20-diterpenoid alkaloids, trichodelphinines A–E, one delnudine-type C20-diterpenoid alkaloid, trichodelphinine F and three known flavonoids, quercetin, quercetin 3-O-β-d-glucopyranoside, and quercetin 3-O-β-d-glucopyranoside-7-O-α-l- ... ...

    Abstract Five hetisane-type C20-diterpenoid alkaloids, trichodelphinines A–E, one delnudine-type C20-diterpenoid alkaloid, trichodelphinine F and three known flavonoids, quercetin, quercetin 3-O-β-d-glucopyranoside, and quercetin 3-O-β-d-glucopyranoside-7-O-α-l-arabinopyranoside, were isolated from whole plants of Delphinium trichophorum Franch. Their structures were elucidated on the basis of extensive spectroscopic analysis, including HSQC, HMBC, 1H–1H COSY, NOESY and X-ray crystallographic analysis, and from chemical evidence. The cytotoxic activities of the diterpenoid alkaloids were evaluated using the MTT method, and the IC50 values of their cytotoxicity against A549 cancer cells ranged from 12.03 to 52.79μM.
    Keywords cytotoxicity ; Delphinium ; diterpenoid alkaloids ; inhibitory concentration 50 ; neoplasm cells ; neoplasms ; quercetin ; spectroscopy ; X-ray diffraction
    Language English
    Dates of publication 2014-01
    Size p. 88-95.
    Publishing place Elsevier Ltd
    Document type Article
    ZDB-ID 208884-8
    ISSN 1873-3700 ; 0031-9422
    ISSN (online) 1873-3700
    ISSN 0031-9422
    DOI 10.1016/j.phytochem.2013.10.011
    Database NAL-Catalogue (AGRICOLA)

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