2024-03-28T15:31:43Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/1934042020-12-09T16:23:54Zcom_10261_48com_10261_5col_10261_301
00925njm 22002777a 4500
dc
El-Toumy, Sayed A.
author
El Souda, Sahar S.
author
Mohamed, Tahia K.
author
Brouard, Ignacio
author
Bermejo, Jaime
author
2012-10-01
The methanolic extract of the leaves of Cassia roxburghii DC., was investigated for its anthraquinone glycosides and antioxidant activity. Two new anthraquinone glycosides named emodin 1-O-β-d-glucopyranosyl-(1→2)- glucopyranoside (1) and aloemodin 8-O-β-d-glucopyranosyl-(1→6)- glucopyranoside (2) along with aloemodin 8-O-β-d-glucopyranoside (3), emodin (4), aloemodin (5) and one flavonoid, quercetin-3-O-α-l- rhamnopyranoside, were isolated from the leaves of C. roxburghii. Structures of the isolated compounds were established by UV, HRESI-MS, and 1D/2D 1H/ 13C NMR spectroscopy. The total extract and some isolated compounds were determined against DPPH (2,2-diphenyl-1-(2,4,6- trinitrophenyl)hydrazinyl radical, for their free radical scavenging activity, the total alcoholic extract showed strong antioxidant activity while the two new compounds showed weak antioxidant activity.
Carbohydrate Research 360: 47-51 (2012)
http://hdl.handle.net/10261/193404
10.1016/j.carres.2012.07.020
Free radicals scavenging activity
Anthraquinones
Cassia roxburghii
Anthraquinone glycosides from Cassia roxburghii and evaluation of its free radical scavenging activity