FLAVONOIDAL COMPOUNDS OFINULA VISCOSAPART II

Abstract

Three flavonoidal compounds were isolated from the flowers o f lnula viscosa L. and identified by spectral methods (Mass, N M R , IR, UV) and chemical reactions. These were 3-rnethoxyquercetin-7-glucoside, 3-methoxyquercetin and quercetin. 3-methoxyquercetin-7-glucoside is a new .compound that was isolated for the first time in nature.

Evaluation of Anti‐oxidant and Acetylcholinesterase Activity and Identification of Polyphenolics of the Invasive Weed Dittrichia viscosa

“…The UV spectrum (λ max at 256 and 292 nm and 356 nm) and the mass spectrum for the peak eluting at t R = 28.41 suggested an isomer of the abovementioned compound (malonate of apigenin glucoside). The compound eluting at 28.88 min was tentatively assigned the structure of methyl-3-O-quercetin, which has been identified previously in the plant (Öksüz, 1977;Wollenweber et al, 1991).…”

“…The UV spectrum (λ max at 256 and 292 nm and 356 nm) and the mass spectrum for the peak eluting at t R = 28.41 suggested an isomer of the above‐mentioned compound (malonate of apigenin glucoside). The compound eluting at 28.88 min was tentatively assigned the structure of methyl‐3‐ O ‐quercetin, which has been identified previously in the plant (Öksüz, ; Wollenweber et al ., ). In addition to the bathochromic shift (λ max 358 nm), the molecular ion was at m / z 317, while the fragment ion at m/z 301 was that after methyl radical fission.…”

Flavonoids fromInula viscosa

“…Hispidulin (4,7, (3) Was firstly eluted with hexane-EtOAc (3:2) and then CHCI3-EtOH (98:2), m.p. 292-293° C (EtOH).…”

Polyphenols of the Inuleae-Inulinae and Their Biological Activities: A Review

“…[ [105][106][107][108][109]152,193,194] Preprints Vicoa glanduligera [11,76,153,188,195] [65] [178,[196][197][198] [199] [40,52,54,66,[115][116][117]200…”