Taskova Rilka, Mitova Maya, Mikhova Bozhanka, Duddeck Helmut
Institute of Botany, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria.
Z Naturforsch C J Biosci. 2003 Sep-Oct;58(9-10):704-7. doi: 10.1515/znc-2003-9-1019.
Two flavonoid aglycons, eight flavonoid glycosides, chlorogenic acid and syringin were isolated from aerial parts of Carthamus lanatus. Isorhamnetin 3-O-beta-D-glucoside and chlorogenic acid were found for the first time in the genus Carthamus and respectively, quercimeritrin, astragalin, kaempferol 3-O-beta-D-sophoroside and syringin in the species. The ethyl acetate fraction of the methanol extract exhibited a higher antioxidant activity than the butanol fraction measured by the alpha,alpha-diphenyl-beta-picrazylhydrazyl (DPPH) free radical scavenging assay. Cytotoxicity and antioxidant activities of the main constituent, luteolin 7-O-beta-D-glucoside, were evaluated.
