reflux for 20 h and allowed to cool, and the nearly quantitatively precipitated dicyclohexylurea was filtered off and washed with a small amount of dichloromethane. The combined organic phases were concentrated in vacuum and the residue was dissolved in ether. The ether solution was washed with NaHC
Structural elucidation of glycosides from Solanum amygdalifolium
✍ Scribed by Alvaro Vázquez; Fernando Ferreira; Patrick Moyna; Lennart Kenne
- Publisher
- John Wiley and Sons
- Year
- 1999
- Tongue
- English
- Weight
- 57 KB
- Volume
- 10
- Category
- Article
- ISSN
- 0958-0344
No coin nor oath required. For personal study only.
✦ Synopsis
The glycoalkaloid solasonine and a new spirosten d-lactone saponin, foliumin A. characterized by NMR spectroscopy, MS and chemical methods as (22S, 23R, 25R)-3b,15a,23-trihydroxyspirost-5-en-26-one 3-O-{a-L-rhamnopyranosyl-(1→2)-[a-L-rhamnopyranosyl-(1→4)]-b-D-glucopyranoside}, have been isolated from the ethanolic extract of the aerial parts of Solanum amygdalifolium.
📜 SIMILAR VOLUMES
The conversion of curcumin by soybean lipoxygenase leads to three stereoisomers of 2-[(4 0 -hydroxy-3 0 -methoxy)phenoxy]-4-(4 00 -hydroxy-3 00 -methoxy-(phenyl)-8-hydroxy-6-oxo-3-oxabicyclo[3.3.0]-7-octene. Their structures and conformational behaviour were elucidated by various 1 H and 13 C NMR me
## Kaempferol -3-O-[6 Glc -O-feruloyl]-b-D-glucopyranosyl-(132)-O-[a-L-rhamnopyranosyl-(136)]-b-D-galactopyranoside (1) was isolated from the aerial parts of Brunfelsia grandiflora ssp. grandiflora. The structure of this novel flavonol glycoside was established by fast atom bombardment-mass spectro
New salfredin-type chromene and benzofurane metabolites ( ¤ were isolated from submerged cultures of the fungal strains Crucibulum laeve DSM 1653 and C. laeve DSM 8519. The structures were elucidated on the basis of UV-VIS spectroscopic, mass spectrometric and NMR spectroscopic evidence. The new met
Natural products / Dimeric steroids