Abstract
seemingly defenseless against predation. However, these beautiful animals usually contain large amounts of diet-derived natural products that help defend them against
predation. We have isolated a blue tetrapyrrole fromNembrotha kubaryana, the known nakafuran-8 and -9 fromHypselodoris infucataand spongiane-16-one fromChromodoris petechialis. These compounds have previously been found in other marine organisms,
thus supporting a link between diet and natural products in the nudibranchs.
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