Novel C-xylosylflavones from the leaves and flowers of Iris gracilipes.
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.
Takayuki
T
Mizuno
Tsunashi
T
Kamo
Nobuhiro
N
Sasaki
Hiroshi
H
Yada
Yoshinori
Y
Murai
Tsukasa
T
Iwashina
D047309:Flavones / Q000737:chemistry*; D035264:Flowers / Q000737:chemistry*; D031323:Iris Plant / Q000737:chemistry*; D015394:Molecular Structure; D018515:Plant Leaves / Q000737:chemistry*
D047309:Flavones