Chemical studies on bryophytes, 22: Flavonoid C-glycosides of Mnium undulatum [moss, saponarin, schaftoside, neoschaftoside, isoschaftoside, neoisoschaftoside, vicenin-2, 6-C-arabinosyl-8-C-hexoside]
1979
Oesterdahl, B.-G. (Uppsala Univ. (Sweden). Inst. of Chemistry)
Seven flavonoid C-glycosides have been isolated from the moss Mnium undulatum Hedw. [Plagiomnium u. (Hedw.) P. Kop.]. As well as saponarin, schaftoside, neoschaftoside, isoschaftoside, neoisoschaftoside and vicenin-2, a previously unknown 6,8-di-C-glycoside is reported: A chrysoeriol 6-C-arabinosyl-8-C-hexoside. ('13)C NMR spectra of saponarin, schaftoside, isoschaftoside and vicenin-2 were measured and used for the structure determinations. The structures of the other three compounds were determined using UV, ('1)H NMR, acid treatment and the MS of the permethyl ethers.
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