Fei WANG ^a,b*, Ya-Ju LI ^b, Fu-Cai REN ^b, Guo-Zhu WEI ^b, and Ji-Kai LIU ^a,*

^a State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences; Kunming 650204, China 

^b BioBioPha Co., Ltd.; Kunming 650204, China

Abstract

Six new ent-15-oxokauran-19-oic acid derivatives, named pterisolic acids A–F (1–6), were isolated from the ethanol extract of the fern Pteris semipinnata (Pteridaceae), and the structures of these new ent-kauranoids were elucidated on the basis of extensive spectroscopic studies and single crystal X-ray diffraction analysis.

文章链接：https://www.jstage.jst.go.jp/article/cpb/59/4/59_4_484/_article/-char/ja/