Abstract
Four new sesterterpenes, named as hippotulosas A-D (1–4), and a known sesterterpene furospinulosin-1 (5) were isolated from the marine sponge Hippospongia fistulosa by various chromatographic methods. Their structures were established by extensive spectroscopic analyses (IR, HR-ESI-MS, 1D and 2D NMR) and by comparison of the spectral data with those reported in the literature.
Acknowledgements
Authors would like to thank Prof. Do Cong Thung, the Institute of Marine Environment and Resources, VAST for the sample collection and taxonomic identification.
Disclosure statement
The author(s) declared no potential conflicts of interest with respect to the research, authorship, and/or publication of this article.