13403-20-8Relevant academic research and scientific papers
Antibacterial Activity of a New Flavone Glycoside from the Stems of Holmskioldia sanguinea Retz.
Yadava,Raghuvansi, Jyotsna
, p. 1815 - 1818 (2019/07/18)
A new flavone glycoside was isolated from ethanolic extract of stem parts of Holmskioldia sanguinea Retz. Its structure was characterized as 3,4′-dihydroxy-5,7-dimethoxyflavone-3-O-β-D-galactopyranosyl(1→4)-O-β-D-arabinopyranosyl-4′-O-α-L-rhamnopyranoside (1) by colour reactions, chemical degradation and spectroscopic analysis. Antibacterial activity of compound 1 was evaluated against various Gram positive and Gram negative bacteria showing a significant effects.
Structural analysis of the O-polysaccharide of the lipopolysaccharide from Azospirillum brasilense Jm6B2 containing 3-O-methyl-D-rhamnose (D-acofriose)
Boyko, Alevtina S.,Dmitrenok, Andrey S.,Fedonenko, Yuliya P.,Zdorovenko, Evelina L.,Konnova, Svetlana A.,Knirel, Yuriy A.,Ignatov, Vladimir V.
experimental part, p. 92 - 95 (2012/09/07)
Two types of neutral O-polysaccharides were obtained by mild acid degradation of the lipopolysaccharide isolated by phenol-water extraction from the asymbiotic diazotrophic rhizobacterium Azospirillum brasilense Jm6B2. The following structure of the major O-polysaccharide was established by composition and methylation (ethylation) analyses, Smith degradation, and 1D and 2D 1H and 13C NMR spectroscopy: α-D-Rhap3OMe 1↓3→4)-α-L-Fucp-(1→4)-β-D-Xylp-(1→ where a non-stoichiometric (～60%) 3-O-methylation of D-rhamnose is indicated by italics.
