Studies on antibacterial constituents from the roots of Rubia cordifolia L
Qiao, Y.F.; Wang, S.X.; Wu, L.J.; Li, X.; Zhu, T.R.
Yao Xue Xue Bao 25(11): 834-839
1990
ISSN/ISBN: 0513-4870 PMID: 2099091 Document Number: 355496
Twelve compounds were isolated from the roots of Rubia cordifolia L. Nine of them were established by chemical and spectroscopic methods to be alizarin (I), 1-hydroxy-2-methyl-9,10--anthraquinone (II), 1,3,6-trihydroxy-2-methyl-9,10-anthraquinone-3-O-(6'-O-acetyl)-.alpha.-L-rhamnosyl(1 .fwdarw. 2)-.beta.-D-glucoside (III), 1,3,6-trihydrozy-2-methyl-9,10-anthraquinone-3-O-.alpha.-L-rhamnosyl(1 .fwdarw. 2)-.beta.-D-glucoside (IV), 1,3,6-trihydrozy-2-methyl-9,10-anthraquinone-3-O-(6'-O-acetyl)-.beta.-D-glucoside (V), 2-carbomethoxy-3-prenyl-1,4-naphthohydroquinone di-.beta.-D-glucoside (VI), rubimallin (VII), .beta.-sitosterol (VIII) and daucosterol (IX), among them, V is a new compound and IX was obtained from this genus for the first time. III, VI and VII showed certain antibacterial activities.