High-speed countercurrent chromatography as a valuable tool to isolate C-glycosylflavones from Cecropia lyratiloba Miquel.
@article{Oliveira2003HighspeedCC, title={High-speed countercurrent chromatography as a valuable tool to isolate C-glycosylflavones from Cecropia lyratiloba Miquel.}, author={R R Oliveira and Michelle C. C. Moraes and Raquel Oliveira Castilho and Ana Paula Valente and Jorge Pedro Pereira Carauta and Da{\'i}se Lopes and Maria Auxiliadora Coelho Kaplan}, journal={Phytochemical analysis : PCA}, year={2003}, volume={14 2}, pages={ 96-9 } }
A new apigeninglycoside, apigenin 6-C-galactosyl-6"-O-beta-galactopyranoside (1), isoorientin, and a mixture of orientin and isovitexin were isolated from leaves of Cecropia lyratiloba by high-speed countercurrent chromatography using a solvent system containing ethyl acetate, butanol, methanol and water. The structural elucidation of 1 was based on NMR spectroscopy.
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References
SHOWING 1-9 OF 9 REFERENCES
Preparative isolation and purification of lutein from the microalga chlorella vulgaris by high-speed counter-current chromatography.
- BiologyJournal of chromatography. A
- 2001
Isovitexin 6″-O-β-d-glucopyranoside: A feeding deterrent to Pieris napi oleracea from Alliaria petiolata
- Environmental Science
- 1998
C-Glycosylflavones with Acetyl Substitution from Rumex acetosa L.
- Chemistry
- 1990
Six flavone C-glycosides : 2", 6"-di-O-acetylisoorientin (1), 2", 6"-di-O-acetylorientin (2), 2"-O-acetylisoorientin (3), 2"-O-acetylorientin (4), isoorientin (5) and orientin (6) were identified…
Carbon-13 NMR of flavonoids
- Chemistry
- 1989
1. Introduction (P.K. Agrawal, K.R. Markham). Flavonoid structure variation - nomenclature. Flavonoid structure establishment - general. Revision of flavonoid structures resulting from carbon-13 NMR…
A revised system of classification of the angiosperms
- Environmental Science
- 1980
A new system of classification of the angiosperms is presented, shown as a two-dimensional diagram or frame-work, but differs in numerous major and minor features.