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).
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Ford et al. (2000) studied this question.
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