title: Cimicifoetisides A and B, two cytotoxic cycloartane triterpenoid glycosides from the rhizomes of Cimicifuga foetida, inhibit proliferation of cancer cells.
abstract: Two new cycloartane-type triterpene glycosides, namely cimicifoetisides A (1) and B (2), along with seven known compounds cimigenol, 25-O-acetylcimigenol, cimigenol 3-O-beta-D-xylopyranoside, 12beta-hydroxycimigenol 3-O-beta-D-xylopyranoside, cimigenol 3-O-alpha-L-arabinopyranoside, 25-deoxyshengmanol 3-O-beta-D-xylopyranoside and cimilactone A, were isolated from the rhizomes of Cimicifuga foetida. Their structures were elucidated as cimigenol 3-O-(2'-O-acetyl)-alpha-L-arabinopyranoside (1) and 25-O-acetylcimigenol 3-O-(2'-O-acetyl)-alpha-L-arabinopyranoside (2). Both compounds 1 and 2 exhibited potent cytotoxicity against rat EAC (Ehrlich ascites carcinoma) and MDA-MB-A231 (human breast cancer) cells with IC50 values of 0.52 and 6.74 microM for 1, and 0.19 and 10.21 microM for 2, suggesting their potential for further investigation as anti-cancer agents.
authors.affiliation: State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, The Chinese Academy of Sciences, Kunming, Yunnan, PR China. slr0807@fimmu.com
authors.forename: Li-Rong
authors.initials: LR
authors.lastname: Sun
authors.forename: Chen
authors.initials: C
authors.lastname: Qing
authors.forename: Yan-Li
authors.initials: YL
authors.lastname: Zhang
authors.forename: Shu-Yu
authors.initials: SY
authors.lastname: Jia
authors.forename: Zhong-Rong
authors.initials: ZR
authors.lastname: Li
authors.forename: Shen-Ji
authors.initials: SJ
authors.lastname: Pei
authors.forename: Ming-Hua
authors.initials: MH
authors.lastname: Qiu
authors.forename: Michael L
authors.initials: ML
authors.lastname: Gross
authors.forename: Samuel X
authors.initials: SX
authors.lastname: Qiu