http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : Hala H. Zaatout (검색결과 2 건)
- 무료
- 기관 내 무료
- 유료
-
Constituents of Erythrina caffra Stem Bark Grown in Egypt
Sawsan El-Masry,Hala M. Hammoda,Hala H. Zaatout,Saleh I. Alqasoumi,Maged S. Abdel-Kader 한국생약학회 2010 Natural Product Sciences Vol.16 No.4
A new 3-indolyl propionate alkaloid; (-) abrine (1), was isolated from the alcohol extract of Erythrina caffra stem bark together with the alkaloid (-) hypaphorine (2). Phytochemical investigation of the chloroform extract led to the isolation of one fatty alcohol; 1-octacosanol, isolated for the first time from genus Erythrina, two dienoid alkaloids; erythraline and erysodine, and three isoflavonoids; 3S (+) 2'-O-methylphaseollidinisoflavan (3), (6aR, 11aR)- 3-hydroxy-10-dimethylallyl-9-methoxypterocarpan, known as sandwicensin (4) and 3R (-) erythbidin A (5). It is worth mentioning that this is the first report for the isolation of these isoflavonoids from E. caffra. The absolute configuration of 3S (+) 2'-O-methylphaseollidinisoflavan (3) was not previously reported. The isolated isoflavonoids showed promising antibacterial activity against Staphylococcus aureus. Keywords - Erythrina caffra, alkaloids, isoflavanoids, Staphylococcus aureus
-
C-Flavonoidal Glycosides from Erythrina caffra Flowers
Sawsan El Masry,Hala M. Hammoda,Mohamed M. Radwan,Samir A. Ross,Hala H. Zaatout 한국생약학회 2010 Natural Product Sciences Vol.16 No.4
A phytochemical investigation of the ethanolic extract of Erythrina caffra flowers from an Egyptian origin yielded three C-flavonoidal glycosides; 5,7,4`-trihydroxyflavone-8-C-β-D-glucopyranoside (vitexin) (1), 5,7,4`-trihydroxyflavone-6-C-β-D-glucopyranosyl-(1→2)-β-D-glucopyranoside (isovitexin-2``-β-D-glucopyranoside) (2), 5, 7, 4`-trihydroxyflavone-6, 8-di-C-β-D-glucopyranoside (vicenin-2) (3) and one O-flavonoidal glycoside; kaempferol-3-O-β-D-glucopyranosyl) (1→2)-β-D-glucopyranoside (4). The structures of the isolated compounds (1 - 4) were elucidated using different spectral techniques (UV, 1D and 2D NMR and HRESIMS). This is the first report for the isolation of flavonoidal glycosides from Erythrina caffra. The antibacterial, antifungal, antimalarial, and antileishmanial activities of the isolates were evaluated. In addition, the cytotoxic activity of the ethanolic extract and the main fractions were tested using brine shrimp bioassay.
ScienceON
DBpia연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
