[Study on chemical constituents of flavonoids in fresh herb of Houttuynia cordata].
OBJECTIVE
To study the flavonoid constituents in fresh herb of Houttuynia cordata.


METHODS
Various column packing materials including Diaion HP - 20, Sephadex LH - 20, ODS and silica gel were employed for the isolation and purification of compounds from H. cordata. The structures of the compounds were identified by physiochemical properties and spectral analysis.


RESULTS
Five compounds were isolated, and their structures were identified as quercetin-3-O-beta-D-galactoside-7-O-beta-D-glucoside (1), kaempferol-3-O-alpha-L-rhamnopyranosyl-(1 --> 6)-beta-D-glucopyranoside (2), quercitrin (3), hyperin (4), quercetin 3-O-alpha-L-rhamnopyranosyl-7-O-beta-D-glucopyranoside (5).


CONCLUSIONS
Compounds 1, 2 and 5 were separated from H. cordata for the first time.
Meng
Jiang
J
School of Chinese Medicine, Hong Kong Baptist University, Hong Kong, China.
Dong
Xiao-Ping
XP
Jiang
Zhi-Hong
ZH
Leung
Sze-Yin Kelvin
SY
Zhao
Zhong-Zhen
ZZ
D005419:Flavonoids / Q000737:chemistry / Q000302:isolation & purification*; D006027:Glycosides / Q000737:chemistry / Q000302:isolation & purification; D052859:Houttuynia / Q000737:chemistry*; D010946:Plants, Medicinal / Q000737:chemistry*; D011794:Quercetin / Q000031:analogs & derivatives* / Q000737:chemistry / Q000302:isolation & purification
D005419:Flavonoids; D006027:Glycosides; C078277:quercetin-3-O-galactoside-7-O-glucoside; D011794:Quercetin