Antioxidant C-glycosyl flavones from the leaves of Sasa kurilensis var. gigantea

Tatsuya Hasegawa; Ayumi Tanaka; Akiko Hosoda; Fumihide Takano; Tomihisa Ohta

doi:10.1016/j.phytochem.2007.12.003

Antioxidant C-glycosyl flavones from the leaves of Sasa kurilensis var. gigantea

Phytochemistry. 2008 Apr;69(6):1419-24. doi: 10.1016/j.phytochem.2007.12.003. Epub 2008 Feb 11.

Authors

Tatsuya Hasegawa¹, Ayumi Tanaka, Akiko Hosoda, Fumihide Takano, Tomihisa Ohta

Affiliation

¹ Department of Pharmacognosy and Chemistry of Natural Products, Graduate School of Natural Science and Technology, Kanazawa University, Kakuma-machi, Kanazawa 920-1192, Japan.

PMID: 18262577
DOI: 10.1016/j.phytochem.2007.12.003

Abstract

C-glycosyl flavones, kurilensin A (1) and B (2), together with two known compounds, tricin-4'-O-beta-d-glucopyranoside (3) and tricin-5-O-beta-d-glucopyranoside (4), were isolated from hot-water extracts of the leaves of Sasa kurilensis. The structure of the compounds was determined by spectroscopic analyses including 1D, 2D NMR and MS. The absolute configuration of sugar moieties in 1 and 2 was determined by chiral HPLC analyses of the benzoyl derivatives of acid hydrolysis. Compounds 1 and 2 exhibited higher radical scavenging activity than ascorbic acid in the 1,1-diphenyl-2-pycrylhydrazyl (DPPH) assay system.

MeSH terms

Antioxidants / chemistry*
Biphenyl Compounds / chemistry
Flavones / chemistry*
Hydrazines / chemistry
Molecular Structure
Picrates
Plant Leaves / chemistry*
Sasa / chemistry*

Substances

Antioxidants
Biphenyl Compounds
Flavones
Hydrazines
Picrates
1,1-diphenyl-2-picrylhydrazyl