Related Experiment Video
Updated: May 30, 2026

High-resolution Tandem Mass Spectrometry for Studying Chemical Constituents of Gynura bicolor DC
Published on: February 2, 2024
Three new phytoecdysteroids containing a furan ring from the roots of Achyranthes bidentata Bl
Qiu-Hong Wang1, Liu Yang, Hai Jiang
1Key Laboratory of Chinese Materia Medica, Heilongjiang University of Chinese Medicine), Ministry of Education, No. 24 HePing Road, XiangFang District, Harbin 150040, China.
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.
Related Concept Videos
Antifungal Agents
Adrenergic Agonists: Chemistry and Structure-Activity Relationship
Aromatic ring substitutions: Substituting the aromatic ring with –OH groups at positions 3 and 4 yields catecholamines (e.g., epinephrine), which have a high affinity for adrenoceptors. Hydrogen bonding between –OH groups and receptors enhances adrenergic activity.
Separation of the aromatic...
Plant Hormones
Plant Hormones
Five-Membered Heterocyclic Aromatic Compounds: Overview