Related Experiment Video
Updated: Dec 28, 2025

A Method for Extracting Pigments from Squid Doryteuthis pealeii
Published on: November 9, 2016
Quintaquinone, a Merosesquiterpene from the Yellow Sponge Verongula cf. rigida Esper
Apisada Jiso1, Siriporn Kittiwisut1,2, Ruttanaporn Chantakul3
1Department of Pharmacognosy and Pharmaceutical Botany, Faculty of Pharmaceutical Sciences , Prince of Songkla University , Hat-Yai , Songkhla 90112 , Thailand.
Abstract:
A chemical investigation of the sponge Verongula cf. rigida led to the isolation of 13 merosesquiterpenes, among which quintaquinone (2), 5-epi-nakijiquinone L (3), and 3-farnesyl-2-hydroxy-5-methoxyquinone (4) were isolated and reported here for the first time. Particularly, compound 2 is the first member of merosesquiterpenes with a polyketide side chain substituted on C-19. All of the isolated compounds were examined for steroid 5α-reductase inhibitory activity. Cyclospongiaquinone 1 (5) showed a strong activity in the same range as that of standard finasteride.
More Related Videos
Related Concept Videos
Red Algae
Other Algae
Green Algae
Bacterial Phylum Verrucomicrobiota

