Constituents of the roots of Rubia yunnanensis.

Anticancer constituents from the roots of Rubia cordifolia L.

Activity-directed isolation of the methylene chloride fraction of the roots of Rubia cordifolia L. resulted in the identification of a new epoxymollugin (3) and eight known compounds (1, 2, 4-9). The structures of the compounds were elucidated from chemical and spectroscopic evidence. In addition, their topoisomerase I and II inhibitory activities and cytotoxicities were measured.

Roots of Rubia tinctorum and Morinda citrifolici are used to study the role of cellular differentiation in anthraquinone biosynthesis. Root cultures of Rubia and Morinda transformed with Agrobacterium rhizo-

Chemical Composition and Bioactivities of the Essential Oil from Etlingera yunnanensis against Two Stored Product Insects.

The chemical composition of the essential oil of Etlingera yunnanensis rhizomes and its contact and repellent activities against Tribolium castaneum (Herbst) and Liposcelis bostrychophila (Badonnel) were investigated. The essential oil obtained from E. yunnanensis rhizomes with hydrodistillation was performed by gas chromatography-flame ionization detection and gas chromatography-mass spectrome...

In Vivo Evaluation of Antioxidant Activity of Alcoholic Extract of Rubia Cordifolia and Its Influence on Lead Nitrate Induced Damage to Tissue

To evaluate the in vivo antioxidant activity of alcoholic extract of the roots of Rubia cordifolia (RC). Male mice, were exposed, either to lead nitrate at a dose containing 40mg/kg body weight or combined with Rubia cordifolia for the first period of 40 days, where the animals were sacrificed for oxidative studies and biochemical studies. Lead has induced a significant increase in LPO, where a...

715-720-Ming Zahu

To study the chemical constituents of Stephania yunnanensis H. S. Lo and their in vitro antibiotic activities. Silica gel, alumina and Sephadex LH-20 chromatographic methods are used to isolate alkaloidal constituents. Structures of the compounds are identified based on physicochemical properties and spectral analysis. Kirby-Bauer test and porous plate method are used to study the inhibitory ac...