The new, cytotoxic dibromotyrosine-derived metabolite psammaplysin C [3], in addition to the two known psammaplysins A [1] and B [2], was isolated from the marine sponge Druinella purpurea. All three compounds were found to possess moderate in vitro cytotoxicity towards the human colon tumor cell-line HCT116.
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Copp et al. (1992) studied this question.
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