1996/01/01 by Tenji KONISHI, Tutomu NISHIO, Shiu Kiyosawa +2 · 2 citations
Biochemistry, Genetics and Molecular Biology · Agricultural and Biological Sciences · #Biological Activity of Diterpenoids and Biflavonoids #Plant biochemistry and biosynthesis #Phytochemistry and Biological Activities
paper · pdf · doi:10.1248/yakushi1947.116.2_148
openalex publication_date 1996/01/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/31
Four flavonoid compounds, avicularin (1), hyperin (2), quercitrin (3), taxillusin (4), were isolated from leaves of Taxillus kaempferi, and three catechin compounds, (+)-catechin (6), procyanidin B-1 (7), procyanidin B-3 (8), showing a reddish purple color on the reaction with Ehrlich reagent, were also isolated from the stems. Each of these seven isolated compounds were identified by comparing the spectral data with those of the references. Compound 8 was examined to substantiate the stereochemical configurations of conformer, a and b in the detailed 1H-nuclear magnetic resonance (1H-NMR) spectrum using the nuclear Overhauser effect (NOE) difference spectroscopy and spin decoupling experiment in the acetone-d6 solution.