title: Cipadesins A-C: novel tetranortriterpenoids from Cipadessa cinerascens.
abstract: [structure: see text] Three novel tetranortriterpenoids, cipadesins A-C (1-3), were isolated from the aerial parts of Cipadessa cinerascens. They possess a novel carbon skeleton, in which rings A and C were joined via C-10 and C-11. Their structures were elucidated by spectral evidence. X-ray crystallographic analysis confirmed the structure of 1.
authors.affiliation: Chengdu Institute of Biology, Chinese Academy of Sciences.
authors.forename: Xiao-Hong
authors.initials: XH
authors.lastname: Yuan
authors.forename: Bo-Gang
authors.initials: BG
authors.lastname: Li
authors.forename: Min
authors.initials: M
authors.lastname: Zhou
authors.forename: Hua-Yi
authors.initials: HY
authors.lastname: Qi
authors.forename: Guo-Lin
authors.initials: GL
authors.lastname: Zhang
mesh_terms: D018360:Crystallography, X-Ray; D036701:Limonins / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D029582:Meliaceae / Q000737:chemistry*; D015394:Molecular Structure; D018515:Plant Leaves / Q000737:chemistry; D014315:Triterpenes / Q000737:chemistry* / Q000302:isolation & purification
chemical_list: D036701:Limonins; D014315:Triterpenes; C512813:cipadesin A; C512811:cipadesin B; C512812:cipadesin C