title: Three new phytoecdysteroids containing a furan ring from the roots of Achyranthes bidentata Bl.
abstract: Three new phytoecdysteroid compounds, named niuxixinsterone A (1), B (2) and C (3) with acetal functions in the side-chain were isolated from Achyranthes bidentata Bl. The structures were established as (20R,22R,24S)-20-O,22-O-(5'-hydroxymethyl)-furfurylidene-2β,3β,14α,25-tetrahydroxy-5β-ergost-7-en-6-one (1), (20R,22R)-20-O,22-O-(5'-hydroxymethyl)-furfurylidene-2β,3β,25-trihydroxy-14β-methyl-18-nor-5β-cholesta-7,12-dien-6-one (2) and (20R,22R,25R)-20-O,22-O-(5'-hydroxymethyl)-furfurylidene-2β, 3β,5β,14α,26-pentahydroxycholest-7-en-6-one (3) by means of spectroscopic evidence.
authors.affiliation: Key Laboratory of Chinese Materia Medica, Heilongjiang University of Chinese Medicine), Ministry of Education, No. 24 HePing Road, XiangFang District, Harbin 150040, China.
authors.forename: Qiu-Hong
authors.initials: QH
authors.lastname: Wang
authors.forename: Liu
authors.initials: L
authors.lastname: Yang
authors.forename: Hai
authors.initials: H
authors.lastname: Jiang
authors.forename: Zhi-Bin
authors.initials: ZB
authors.lastname: Wang
authors.forename: Bing-You
authors.initials: BY
authors.lastname: Yang
authors.forename: Hai-Xue
authors.initials: HX
authors.lastname: Kuang
mesh_terms: D029044:Achyranthes / Q000737:chemistry*; D026461:Ecdysteroids / Q000737:chemistry*; D005663:Furans / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure; D018517:Plant Roots / Q000737:chemistry*
chemical_list: D026461:Ecdysteroids; D005663:Furans