1. Methoxyflavonoids from Pinaropappus roseus.
- Author
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Harput, Ü. Sebnem, Saracoglu, Iclal, and Ogihara, Yukio
- Subjects
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FLAVONOIDS , *PLANT pigments , *RUTIN , *QUERCETIN , *PLANTS - 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. [ABSTRACT FROM AUTHOR]
- Published
- 2004