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The new compound, asperic acid (1), and the known compounds hexylitaconic acid (2), malformin C (3), pyrophen (4), and asperazine (5) were isolated from the saltwater culture of Aspergillus niger derived from a Caribbean sponge, Hyrtios proteus. The structure elucidation of asperic acid is presented.
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Varoglu et al. (1999) studied this question.
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