Methoxyflavonoids from Pinaropappus roseus

Authors : Ü. Şebnem Harput, Iclal Saracoğlu, Yukio Ogihara

Pages : 761-766

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Publication Date : 9999-12-31

Article Type : Makaleler

Abstract :Three rare methoxyflavonoids, rhamnazin 3-O-rutinoside (1), rhamnocitrin 3-O-rutinoside (2) and isorhamnetin 3-O-rutinoside (3), were isolated from the methanolic extract of Pinaropappus roseus together with 2 well-known flavonoids, quercetin 3-O-rutinoside (=rutin) (4) and kaempferol 3-O-rutinoside (5). The structures of the isolated compounds were elucidated on the basis of UV, 1D and 2D NMR and FAB-Mass spectral analysis. Free radical scavenging activities of the isolated compounds were also demonstrated. This is the first report on the chemical composition of the genus Pinaropappus.
Keywords : Pinaropappus roseus, Asteraceae, rhamnazin 3-O-rutinoside, rhamnocitrin 3-O- rutinoside, isorhamnetin 3-O-rutinoside, flavonoids