http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Antioxidant and antimicrobial constituents of Crucianella maritima L.
Jihan M. Badr 한국생약학회 2008 Natural Product Sciences Vol.14 No.4
Phytochemical further investigation of the chloroform extract of the aerial parts of Crucianella maritima L. (Rubiaceae) growing in Egypt resulted in the isolation of a new anthraquinone; 3-formyl-1-hydroxy- 2-methoxy anthraquinone (3) along with the four known compounds isolated for the first time from the genus Crucianella; alizarin-1-methyl ether (2), 1,4-dihydroxy-2-methoxy anthraquinone (5), 1, 3, 6-trihydroxy-2- methoxy anthraquinone (7) and the flavonol kaempferol (8), beside four known compounds previously isolated from the same plant. The structures of the isolated compounds were established based on different spectroscopic data including UV, IR, EIMS, 1D and 2D-NMR. Moreover, the antioxidant and antimicrobial activities of the isolated compounds were evaluated.
Anthraquinones with Antibacterial Activities from Crucianella maritima L. Growing in Egypt
Abdalla M. El-Lakany,Maha A. Aboul-Ela,Maged S. Abdel-Kader,Jihan M. Badr,Nawal N. Sabri,Yousry Goher 한국생약학회 2004 Natural Product Sciences Vol.10 No.2
From the extracts of Crucianella maritima L. (Rubiaceae), five new anthraquinones namely; 1-hydroxy- 2-methyl-6-methoxy anthraquinone, 6-methoxy-2-methyl quinizarin, 6-methyl-anthragallol-2,3-dimethyl ether, 6-methyl-anthragallol-2-methyl ether, and 1-hydroxy-2-carbomethoxyanthraquinone were isolated and identified. In addition, deacetyl asperulosidic acid 6'-glucoside sodium salt, a new iridoid diglucoside, along with twelve known anthraquinones, three flavonols, three sterols, and one triterpene were also isolated and identified for the first time from this plant. Their chemical structures were established by physical, chemical and spectroscopic data, including UV, MS, ID- and 2D-NMR analyses. The antimicrobial, cytotoxic activities and a preliminary clinical trial of the crude extracts and some isolates are also presented. Chemotaxonomical aspects are briefly discussed.
Three Antioxidant Compounds of the Red Alga Liagora farinosa
Hala M. Hammoda,Jihan M. Badr,Diaa T. A. Youssef 한국생약학회 2007 Natural Product Sciences Vol.13 No.2
of the chloroform soluble fraction of the red alga Liagora farinosa, collected fromHurghada at the Red Sea resulted in the isolation of three compounds; a nucleoside (thymidine) and twoglycosides (methyl-β-D-xylopyranoside and glycerol-2-α-D-glucopyranoside). The structures of the isolatedcompounds were established on the basis of different spectroscopic techniques as well as comparison with thepreviously published data. This is the first report for the isolation of the three compounds from red algae;moreover, the compounds were examined for their antioxidant activity and showed variable activity.KeywordsRed algae, Liagora farinosa, nucleoside, methyl-β-D-xylopyranoside, glycerol-2-α-D-glucopyranoside,antioxidant activity.
Nucleoside Constituents of the Egyptian Tunicate Eudistoma laysani
Diaa T. A. Youssef,Dina R. Abou-Hussein,Jihan M. Badr 한국생약학회 2007 Natural Product Sciences Vol.13 No.3
investigation of the crude extract of the Egyptian marine tunicate Eudistoma laysani led tothe isolation of a new nucleoside; 3-deazainosine and four known ones; inosine, 2'-deoxyuridine, adenosine and2'-deoxyadenosine. Structural elucidation of the isolated compounds was based on intensive studies of theirspectral data including 1D (1H and 13C) and 2D (1H-1H COSY, HMQC, HMBC) NMR together with masspectra. The antioxidant effects of the isolated compounds were determined using DPPH, where they exhibitedsignificant activities.Keywords Tunicates, Eudistoma laysani, nucleosides, spectroscopic techniques, antioxidant activity.