Studies of Australian soft corals. XXVI. Tetraprenylbenzoquinone derivatives from a Nephthea species of soft coral (Octocorallia, Alcyonacea)

Abstract

5-Methyl-2-tetraprenyl-p-benzoquinone (4) and its cyclized 2H-1- and 3,4-dihydro-2H-1-benzopyran derivatives (5) and (6) have been isolated from the soft coral Nephthea sp. Structures were assigned on the basis of spectroscopic evidence and the nature of the side chain in (4) and (5) was confirmed by micro-ozonolysis.