title: [Novaeguineside G, A new aasterosaponine from the starfish Culcita novaeguineae].
abstract: OBJECTIVE
  To study the bioactive asterosaponin from the starfish Culcita novaeguineae.
  
  
  METHODS
  Guided by Pyricularia oryzae bioassay method with a combination of multi-chromatographies, the bioactive asterosaponins were separated from the srarfish Culcita novaeguineae.
  
  
  RESULTS
  A asterosaponin was obtained and identified by chemical methods and spectral analyses especially ESI-MS and 2D-NMR techniques, its structure was elucidated as: sodium (20R,22R,23S,24S)-6alpha-O-{beta-D- fucopyranosyl-(1-->2 )--beta-D-quinovopyranosyl-(1-->4)-[beta-D-quinovopyranosyl-(1-->2)] -beta-D-quinovopyranosyl-(1-->3)-beta-D-glucopyranosyl}-22,23-epoxy-20-hydroxy24-methyl-5a-cholest-9 (11)-en-3P-yl-sulfate.
  
  
  CONCLUSIONS
  The compound is a new asterosaponin,named as novaeguineside G.
authors: Zhejiang Pharmaceutical College, Ningbo 315000, China. zjj@zjbti.net.cn
authors: Jia-Jia
authors: JJ
authors: Zhang
authors: Jun
authors: J
authors: Wu
authors: Kai-Yi
authors: KY
authors: Wang
mesh_terms: D000818:Animals; D000970:Antineoplastic Agents / Q000737:chemistry* / Q000302:isolation & purification; D001681:Biological Assay; D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure; D012503:Saponins / Q000737:chemistry* / Q000302:isolation & purification*; D013215:Starfish / Q000737:chemistry*
chemical_list: D000970:Antineoplastic Agents; D012503:Saponins