Discorhabdin R: A New Antibacterial Pyrroloiminoquinone from Two Latrunculiid Marine Sponges, <i>Latrunculia</i> sp. and <i>Negombata</i> sp.

Abstract

Two sponges belonging to the family Latrunculiidae (Negombata and Latrunculia sp.) collected during scientific trawling operations in Prydz Bay, Antarctica, and by scuba off Port Campbell, Victoria, have yielded a new antibacterial pyrroloiminoquinone, discorhabdin R (2). The structure was assigned as 2 on the basis of detailed spectroscopic analysis and comparison with the known co-metabolite discorhabdin B (3).