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Published on: January 14, 2017
[Novaeguineside G, A new aasterosaponine from the starfish Culcita novaeguineae]
Jia-Jia Zhang1, Jun Wu, Kai-Yi Wang
1Zhejiang Pharmaceutical College, Ningbo 315000, China. zjj@zjbti.net.cn
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.
Conclusion:
The compound is a new asterosaponin,named as novaeguineside G.
