Natural Product Communications 2015-Mar
Novel C-xylosylflavones from the leaves and flowers of Iris gracilipes.
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Keywords
Abstract
Two new C-glycosylflavones, apigenin 7,4'-dimethyl ether 6-C-β-[(4"'-acetyl-L-rhamnopyranosyl)-(1-->2)-xylopyranoside] (1) and apigenin 7,4'-dimethyl ether 6-C-β-L-rhamnopyranosyl-(1-->2)-xylopyranoside (2) were isolated from the leaves of Iris gracilipes (Iridaceae), along with two known flavonoids, swertiajaponin (3) and swertisin (4). C-Xylosylflavones 1 and 2 were elucidated by UV and NMR spectroscopy, mass spectrometry, and acid and alkaline hydrolyses. These novel compounds were also presented in the flowers.
