Two compounds were isolated from EtOH extracts,and their structures were elucidated as conduritol and β-sitosterol on the basis of spectral evidence and by comparison with the authentic samples.

Result: Eight compounds were isolated from Marsdenia tenacissima and the structures of five compounds among them were identified as marsdekoiside D(Ⅰ), marsdekoiside B(Ⅱ), conduritol (Ⅲ), dihydro conduritol (Ⅳ) and marsdeoreophiside B(Ⅴ).

Research Advance on the New Inhalation Anesthetic-Sevoflurane Ⅰ.Chemophysiological characterities,veterianry pharmcokinetics and metabolism;

Furthermore, the metabolism of “SHENFUTANG” was studied in vivo .

odorifera and its quality control method, as well as the metabolism of this medicinal herb were investigated in detail.

The toxicity of arsenic is related to its chemical form after the metabolism in vivo;the trivalent arsenicals with various important thiol-enzyme in vivo result in the inactivation of enzymes, and the cellular respiration and the normal metabolism are hindered,thus the cells are damaged.

The study of chemical composition and pharmacological functionon of Marsdenia plants;

The stem of Marsdenia tenacissima(Asclepiadaceae)was firstly recorded as an herbal medicine in "Materia Medica of Southern Yun Nan"(Dian Nan Ben Cao)with the name of Tongguangteng.

Leaf Epidermis of 11 Genera of Marsdenieae(Asclepiadaceae) of China;

Pollen(Pollinaria)morphology of 11 specises in 7 Genera of Marsdenieae (Aclepiadaceae)was described under light microscope(LM)and scanning electronic microscope (SM).