Is 18α-Glycyrrhizin a real natural product? Improved preparation of 18α-Glycyrrhizin from 18β-Glycyrrhizin as a positive standard for HPLC analysis of licorice extracts

【2022】

 

Kritamorn Jitrangsri1), Kazuaki Kamata2), Mana Akiba2), Yoshie Yajiri2), Masami Ishibashi1), Jin Tatsuzaki2) & Tsutomu Ishikawa2)

 

1) Chiba University
2) Tokiwa Phytochemical Co., Ltd.

 

Journal of Natural Medicines (2022)