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.
