title: Pterisolic acids A-F, new ent-kaurane diterpenoids from the fern Pteris semipinnata.
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.
authors.affiliation: State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences.
authors.forename: Fei
authors.initials: F
authors.lastname: Wang
authors.forename: Ya-Ju
authors.initials: YJ
authors.lastname: Li
authors.forename: Fu-Cai
authors.initials: FC
authors.lastname: Ren
authors.forename: Guo-Zhu
authors.initials: GZ
authors.lastname: Wei
authors.forename: Ji-Kai
authors.initials: JK
authors.lastname: Liu
mesh_terms: D018360:Crystallography, X-Ray; D045786:Diterpenes, Kaurane / Q000737:chemistry*; D008968:Molecular Conformation; D032495:Pteris / Q000737:chemistry*
chemical_list: D045786:Diterpenes, Kaurane