title: Phytoecdysteroids from the roots of Achyranthes bidentata Blume.
abstract: Two new phytoecdysteroids, (25S)-20,22-O-(R-ethylidene)inokosterone and 20,22-O-(R-3-methoxycarbonyl)propylidene-20-hydroxyecdysone, together with six known phytoecdysteroids 3-8 were isolated from the roots of Achyranthes bidentata Blume. The new structures were established on the basis of spectroscopic studies and chemical evidences. The absolute configuration at C-25 in the structure of known compound 3 was determined by chemical and spectroscopic means.
authors.affiliation: Key Laboratory of Plant Resources Conservation and Sustainable Utilization, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China.
authors.forename: Mei
authors.initials: M
authors.lastname: Zhang
authors.forename: Zhong-Yu
authors.initials: ZY
authors.lastname: Zhou
authors.forename: Jing
authors.initials: J
authors.lastname: Wang
authors.forename: Yong
authors.initials: Y
authors.lastname: Cao
authors.forename: Xue-Xiang
authors.initials: XX
authors.lastname: Chen
authors.forename: Wei-Min
authors.initials: WM
authors.lastname: Zhang
authors.forename: Li-Dong
authors.initials: LD
authors.lastname: Lin
authors.forename: Jian-Wen
authors.initials: JW
authors.lastname: Tan
mesh_terms: D029044:Achyranthes / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure; D010840:Phytosterols / Q000737:chemistry / Q000302:isolation & purification*; D010936:Plant Extracts / Q000737:chemistry / Q000302:isolation & purification*; D018517:Plant Roots / Q000737:chemistry*
chemical_list: C572969:(25S)-20,22-O-(R-ethylidene)inokosterone; C572970:20,22-O-(R-3-methoxycarbonyl)propylidene-20-hydroxyecdysone; D010840:Phytosterols; D010936:Plant Extracts