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Updated: May 5, 2026

A Fish-feeding Laboratory Bioassay to Assess the Antipredatory Activity of Secondary Metabolites from the Tissues of Marine Organisms
Published on: January 11, 2015
Two new diketopiperazines from the marine sponge Dysidea sp
Yu Lei1, Xiao-Jian Liao, Xi-Wen Xing
1Department of Chemistry, College of Chemistry and Materials Science, Jinan University, Guangzhou, PR China.
None:
A chemical investigation on the marine sponge Dysidea sp. resulted in the isolation of a series of diketopiperazines, including two new compounds, dysidines A (1) and B (2) as well as six known ones (3-8). Their structures with absolute configurations were determined on the basis of UV, IR, HRMS, NMR and calculated ECD method. Additionally, the cytotoxic, anti-inflammatory, antibacterial and antiviral activities of 1-8 were also tested. However, none of them exhibited significant bioactivities.
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