High-performance liquid chromatographic profile and 1H quantitative nuclear magnetic resonance analyses for quality control of a Xinjiang licorice extract

Atsumi Miyazaki, Eerdunbayaer, Tsugumi Shiokawa, Hiroko Tada, Yunhe Lian, Shoko Taniguchi, Tsutomu Hatano

Research output: Contribution to journalArticle

Abstract

Various pharmacological properties of Xinjiang licorice flavonoids have been reported recently. We have investigated constituents corresponding to distinct peaks on the high-performance liquid chromatography (HPLC) profile of a flavonoid-rich extract from licorice, and identified 13 flavonoids, including licochalcone A (1), licochalcone B (3), glabrone (4), and echinatin (5), by isolating them and then performing high-resolution electrospray ionization mass spectrometry and 1H nuclear magnetic resonance (NMR) spectral analyses. We then applied the 1H quantitative NMR (qNMR) method for analysis of major flavonoids, 1 and 3–5 in the extract. The 1H qNMR results were supported by 13C NMR analysis. The results demonstrated the utility of the combination of HPLC profiling and qNMR analyses for quality control of Xinjiang licorice. Additionally, we observed a moderate inhibitory effect of the most abundant constituent, licochalcone A (1), on acetylcholine esterase activity, suggesting utility as a seed for drug development.

Original languageEnglish
Pages (from-to)1-11
Number of pages11
JournalBioscience, Biotechnology and Biochemistry
DOIs
Publication statusPublished - 2020

Keywords

  • Glycyrrhiza inflata
  • Licorice
  • acetylcholine esterase
  • licochalcone A
  • qNMR

ASJC Scopus subject areas

  • Biotechnology
  • Analytical Chemistry
  • Biochemistry
  • Applied Microbiology and Biotechnology
  • Molecular Biology
  • Organic Chemistry

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