[Study on steroidal and triterpenoid constituents from Cissus pteroclada].

Objective: To study the chemical constituents of ethnical drug Cissus pteroclada.

Methods: Silica gel column chromatography was employed to separate the constituents from EtOAc extraction of Cissus pteroclada and their structures were identified by physicochemical properties as well as spectrum analysis.

Results: Five steroidal compounds and 2 triterpenoid constituents were obtained. Their structures were identified as: stigmasterol (1), stigmasterol acetate (2), stigmasta-5, 22-dien-3-O-beta-D-glucopyranoside (3), beta-sitosterol (4), daucousterol (5), taraxerone (6), oleanolic acid (7).

Conclusion: All the compounds are isolated from this plant for the first time except for compound 4 and 5. Compounds 1 - 3 are obtained from this genus for the first time.