juncuenin D 在
Chiralpak IA column with 250 mm × 4.6 mm i.d., 5 μm (Daicel, Chemical Industries, Ltd.) 作用下,
以
正己烷 、 异丙醇 为溶剂,
生成 juncuenin D 、 juncuenin D
参考文献:
名称:
Phenanthrenes from Juncus inflexus with Antimicrobial Activity against Methicillin-Resistant Staphylococcus aureus
摘要:
The present study has focused on an investigation of the antibacterial effects of Juncus inflexus and the isolation and identification of its active compounds. Eleven phenanthrenes were isolated from a methanolic extract of the roots. Four compounds (jinflexins AD, 14) are new natural products, while seven phenanthrenes [juncuenins A (5), B (6), and D (8), juncusol (7), dehydrojuncuenins A (9) and B (11), and dehydrojuncusol (10)] were isolated for the first time from the plant. Jinflexin D (4) is a dimer with an unprecedented heptacyclic ring system. The absolute configurations of the new compounds were determined by TDDFT-ECD calculations, and their enantiomeric purity was checked by chiral HPLC analysis. Extracts of different polarity (n-hexane, dichloromethane, and ethyl acetate) were evaluated for their antimicrobial effects against methicillin-resistant Staphylococcus aureus, extended-spectrum beta-lactamase (ESBL)-producing Citrobacter freundii, Escherichia coli, Enterobacter cloacae, Klebsiella pneumoniae, multiresistant Acinetobacter baumannii, and Pseudomonas aeruginosa. The MIC values of the isolated compounds were determined by a microdilution method. Jinflexin B (2), juncusol (7), juncuenin D (8), and dehydrojuncuenin B (11) showed significant activity (MIC value range 12.5100 mu g/mL) against MRSA strains.
[EN] 9,10-DIHYDROPHENANTHRENE COMPOUNDS AND USE THEREOF IN TREATMENT OF LIVER INJURY<br/>[FR] COMPOSÉS DE 9,10-DIHYDROPHÉNANTHRÈNE ET LEUR UTILISATION DANS LE TRAITEMENT D'UNE LÉSION HÉPATIQUE<br/>[ZH] 9,10-二氢菲类化合物及其用于肝损伤治疗的用途