A new biflavonoid from Aristolochia contorta.
From the fruits of Aristolochia contorta Bge, beside the known aristolochic acids IVa and VII, aristolactam-N-beta-D-glucopyanoside, aristoloctam Ia N-beta-D-glucopyanoside, pinitol and daucosterol, a new biflavonoid was isolated. Its structure was determined as (+/-)-2"R,3"R-dihydro-3"-hydroxyamentoflavone (1) by means of spectral methods including 1D-, 2D-NMR and HR-ESIMS and the known compounds were identified on the basis of comparing their NMR data with those of the corresponding compounds in the literature.
Yu
Li-Li
LL
Department of Chemistry, Yunnan Normal University, PR China.
Huang
Rong
R
Lv
Yu-Ping
YP
Zhao
Yong
Y
Chen
Yegao
Y
D030022:Aristolochia / Q000737:chemistry*; D044946:Biflavonoids / Q000737:chemistry* / Q000302:isolation & purification; D005638:Fruit / Q000737:chemistry; D009682:Magnetic Resonance Spectroscopy; D010936:Plant Extracts / Q000737:chemistry; D021241:Spectrometry, Mass, Electrospray Ionization
C505884:2''R,3''R-dihydro-3''-hydroxyamentoflavone; D044946:Biflavonoids; D010936:Plant Extracts