Isoarenarol, A New Protein Kinase Inhibitor from the Marine Sponge Dysidea arenaria

Abstract
The novel sesquiterpene hydroquinone isoarenarol (1) and the known compound arenarol (2) were isolated from extracts of the marine sponge Dysidea arenaria Bergquist as part of a search for new protein kinase inhibitors. Both 1 and 2 showed potent and selective protein kinase inhibition in vitro.