Further constituents from Caralluma negevensis.
Two new megastigmane glycosides (1 and 2) and two new flavone glycosides (3 and 4) were isolated from the methanol extract of the whole plant of Caralluma negevensis Zohary (Asclepiadaceae). The structures of the isolated compounds were characterized as (9R)-2beta,9-dihydroxymegastigma-4,7-dien-3-one-9-O-alpha-L-rhamnopyranosyl-(1-->6)-beta-D-glucopyranoside (1), 2beta,9-dihydroxymegastigma-4-en-3-one 9-O-alpha-L-rhamnopyranosyl-(1-->6)-beta-D-glucopyranoside (2), luteolin 3'-O-beta-D-glucopyranoside-4'-O-alpha-L-rhamnopyranosyl-(1-->2)-beta-D-glucopyranoside (3), and luteolin 3',4'-di-O-beta-D-glucopyranoside (4). The structures of the isolated compounds were established on the basis of spectral evidence and chemical transformation.
Bader
Ammar
A
Faculty of Pharmacy, Al-Zaytoonah University of Jordan, PO Box 130, 11733 Amman, Jordan.
Braca
Alessandra
A
De Tommasi
Nunziatina
N
Morelli
Ivano
I
D029062:Apocynaceae / Q000737:chemistry*; D002236:Carbohydrate Conformation; D005591:Chemical Fractionation; D002851:Chromatography, High Pressure Liquid / Q000379:methods; D002855:Chromatography, Thin Layer; D003512:Cyclohexanones / Q000737:chemistry / Q000302:isolation & purification*; D005419:Flavonoids / Q000737:chemistry* / Q000302:isolation & purification*; D005960:Glucosides / Q000737:chemistry / Q000302:isolation & purification*; D006027:Glycosides / Q000737:chemistry / Q000302:isolation & purification*; D006868:Hydrolysis; D045792:Norisoprenoids; D019906:Nuclear Magnetic Resonance, Biomolecular
D003512:Cyclohexanones; D005419:Flavonoids; D005960:Glucosides; D006027:Glycosides; D045792:Norisoprenoids; C413264:megastigmane