Abstract

Abstract Seven novel pyrones of polypropionate biosynthetic origin have been isolated from the dorsal appendages (cerata) of the autotomizing ascoglossan mollusc Cyerce cristallina , and their structure established by means of spectroscopic techniques. The new compounds exhibited ichthyotoxic activity. Their possible involvement in the mollusc defensive mechanisms, as well as in regenerative processes following the autotomy, is hypothesized.

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