A New Biologically Active Malyngamide from a New Zealand Collection of the Sea Hare <i>Bursatella leachii</i>

A new malyngamide, S (<b>1</b>), was isolated from a New Zealand collection of the sea hare <i>Bursatella leachii</i> and structurally characterized by spectroscopic methods and chemical degradation. Malyngamide S exhibited cytotoxicity and antiinflammatory properties.