6-Hydroxyrubiadin has antioxidant activity, EC(50) is 14.7ug/ml.

The extractsof Rubia cordifolia were tested by the method of DPPH scavenging free radical for the first time. From the active chloroformextract,eleven compounds,Mollugin(1),Furomollugin(2),6-Hydroxyrubiadin(3),Alizarin(4),6-methxylquinizarin(5),1-hydroxy-2-methylanthraquinone(6),Xanthopurpurin(7),Anthragallol(8),Rubiadin(9),Ursolic acid(10),β-sitosterol(11),were isolated.

87686-86-0

C15H10O5

270.24

6-羟基茜草素;1,3,6-三羟基-2-甲基蒽醌

(< 1 mg/ml refers to the product slightly soluble or insoluble )
Powder: -20°C for 3 years
In solvent: -80°C for 2 years