Diarrhetic shellfish poisoning is an illness caused by toxins accumulated i
n shellfish and produced by dinoflagellates, mainly of the Dinophysis and P
rorocentrum genera. This paper reports the isolation and spectroscopic stru
ctural elucidation of a new compound, DTX-6 (2), an ester derivative of oka
daic acid (OA) (1), isolated from an artificial culture of strain PLV2 of P
rorocentrum lima.