A new flavone glycoside, 5-hydroxy 7,3',4',5'-tetra-methoxyflavone 5-O-beta-D-xylopyranosyl-(1-->2)-alpha-L-rhamnopyranoside from Bauhinia variegata Linn.
A new flavone glycoside m.f. C(30)H(36)O(15) m.p. 252-253 degrees C, [M]+ 636 (EIMS) was isolated from the acetone soluble fraction of the concentrated 95% ethanolic extract of the seeds of Bauhinia variegata (Linn). It was identified as 5-hydroxy7,3',4',5'-tetra-methoxyflavone 5-O-beta-D-xylopyranosyl-(1-->2)-alpha-L-rhamnopyranoside (1) by various colour reactions, chemical degradations and spectral techniques.
Yadava
R N
RN
Department of Chemistry, Dr. H. S. Gour University, Sagar, India. rnyadava@yahoo.com
Reddy
V M
VM
D016282:Aspartic Acid Endopeptidases / Q000737:chemistry; D002855:Chromatography, Thin Layer; D007887:Fabaceae / Q000737:chemistry*; D005419:Flavonoids / Q000737:chemistry / Q000302:isolation & purification*; D008401:Gas Chromatography-Mass Spectrometry; D006027:Glycosides / Q000737:chemistry / Q000302:isolation & purification*; D006847:Hydrocarbons, Iodinated / Q000737:chemistry; D009682:Magnetic Resonance Spectroscopy; D010504:Periodic Acid / Q000737:chemistry; D012639:Seeds / Q000737:chemistry; D013055:Spectrophotometry, Infrared; D013464:Sulfuric Acids / Q000737:chemistry
C451584:5-hydroxy 7,3',4',5'-tetra-methoxyflavone 5-O-xylopyranosyl-(1-2)-rhamnopyranoside; D005419:Flavonoids; D006027:Glycosides; D006847:Hydrocarbons, Iodinated; D013464:Sulfuric Acids; D010504:Periodic Acid; C014055:methyl iodide; D016282:Aspartic Acid Endopeptidases; C022772:Aspergillus oryzae carboxyl proteinase; C033158:sulfuric acid