title: Astataricusones A-D and astataricusol A, five new anti-HBV shionane-type triterpenes from Aster tataricus L. f.
abstract: Five new shionane-type triterpenes, astataricusones A-D (compounds 1-4) and astataricusol A (5), together with one known shionane-type triterpene 6 were obtained from the roots and rhizomes of Aster tataricus L. f. Their structures were elucidated on the basis of spectroscopic data, mainly NMR and MS data. The absolute configurations of 1 and 4 was determined by single crystal X-ray diffraction and CD analysis. Compound 2 showed inhibitory activity on HBsAg secretion with an IC50 value of 23.5 μM, while 2 and 6 showed inhibitory activities on HBeAg secretion with IC50 values of 18.6 and 40.5 μM, and cytotoxicity on HepG 2.2.15 cells with CC50 values of 172.4 and 137.7 μM, respectively. Compounds 2 and 6 also exhibited inhibitory activities on HBV DNA replication with IC50 values of 2.7 and 30.7 μM, respectively.
authors.affiliation: State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Heilongtan, Kunming 650201, China. nhtan@mail.kib.ac.cn.
authors.forename: Wen-Bing
authors.initials: WB
authors.lastname: Zhou
authors.forename: Guang-Zhi
authors.initials: GZ
authors.lastname: Zeng
authors.forename: Hui-Min
authors.initials: HM
authors.lastname: Xu
authors.forename: Wen-Jun
authors.initials: WJ
authors.lastname: He
authors.forename: Ning-Hua
authors.initials: NH
authors.lastname: Tan
mesh_terms: D000998:Antiviral Agents / Q000737:chemistry*; D031173:Aster Plant / Q000737:chemistry*; D018360:Crystallography, X-Ray; D006515:Hepatitis B virus / Q000187:drug effects; D015394:Molecular Structure; D019906:Nuclear Magnetic Resonance, Biomolecular; D010936:Plant Extracts / Q000737:chemistry; D014315:Triterpenes / Q000737:chemistry* / Q000494:pharmacology
chemical_list: D000998:Antiviral Agents; D010936:Plant Extracts; D014315:Triterpenes