A new flavone C-glycoside, 5-O-acetyl-2″-α-rhamnopyranosylisovitexin (1), was isolated from the aerial parts of Lychnis senno Siebold et Zucc. (Family Caryophyllaceae), along with 2″-α-rhamnopyranosylisovitexin (2), 2″-α-rhamnopyranosylisoorientin (3) and isoorientin 3′-mehyl ether (4). All these compounds were isolated for the first time from L. senno and their antioxidative activity was analyzed by the 2,2′-azino-bis (3-ethylbenzothiazoline-6-sulfonic acid) diammonium salt (ABTS) radical-scavenging method. Compound 3 showed moderate antioxidative activity.
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A part of this study was presented at: YaharaS., FukusakoK., IshiguroK., MaedaE., NakataY. (2006) Study of Senno (Lychnis senno) in medicinal plant garden II.The 127thAnnual Meeting of Pharmaceutical Society of Japan. Toyama (in Japanese).
