Abstract:Objective: To find new active constituents from Rhizome of Cimicifuga foetida. Method: Various column chro-matographic techniques were employed for isolation and purification. The structures were elucidated on the basis of spectral and chemical evidences. Result: Four triterpenoid compounds were isolated and identified as 7,8-didehydro-27-deoxyactein(1), 24-O-acetyl-shengmanol-3-O-β-D-xyl[(23R,24R),2], cimigenol(3), cimigenol-3-O-β-D-xyl(4). Conclusion: Compound 1 is a new compound, 2-4 were obtained from this medicinal material for the first time. The antiosteoporosis activity screening in vitro (by the method of SRB) indicates that Compounds 1, 2 and 4 can promote the proliferation for rat Osteoblastoma cell line (UMR106) at the concentration of 10-9kg·L-1.