A new isomalabaricane triterpenoid, rhabdastrellic acid-A
(1), was isolated from the sponge
Rhabdastrella
globostellata (Carter)
collected from the South China Sea near Hainan Island,
People's Republic of China. Its structure was established on the
basis of UV, IR, MS, 1H-NMR, 13C-NMR, and 2D NMR spectrometry. The relative and
absolute stereochemistries were
solved by NOESY and CD studies, respectively.
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