Secondary Metabolites from Phlomis syriaca and Their Antioxidant Activities

Authors : Ü. Şebnem HARPUT, İhsan ÇALIŞ, İclal SARACOĞLU, Ali A. DÖNMEZ, Akito NAGATSU

Pages : 383-390

View : 14 | Download : 5

Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :An iridoid glucoside, lamiide insert ignore into journalissuearticles values(1);; 4 phenylethanoid glycosides, acteoside insert ignore into journalissuearticles values(2);, b-OH acteoside insert ignore into journalissuearticles values(3);, leucosceptoside A insert ignore into journalissuearticles values(4); and samioside insert ignore into journalissuearticles values(5);; a caffeic acid ester, chlorogenic acid insert ignore into journalissuearticles values(6);; 2 flavone glucosides, luteolin-7-O-glucopyranoside insert ignore into journalissuearticles values(7); and chrysoeriol-7-O-glucopyranoside insert ignore into journalissuearticles values(8);; and a flavanone aglycone, naringenin insert ignore into journalissuearticles values(9);, were isolated from the aerial parts of Phlomis syriaca. The structures of the isolated compounds were elucidated by means of spectroscopic insert ignore into journalissuearticles values(UV, IR, 1D- and 2D-NMR, and FAB-MS); methods. Free radical scavenging activity of the isolated compounds was determined using the radical 2,2-diphenyl-1-picrylhydrazyl insert ignore into journalissuearticles values(DPPH);, spectroscopically.
Keywords : Phlomis syriaca, Lamiaceae, Iridoid glucosides, Phenylethanoid glycosides, Flavonoids, Free radical scavenging activity, DPPH