Prorocentrol, a Polyoxy Linear Carbon Chain Compound Isolated from the Toxic Dinoflagellate Prorocentrum hoffmannianum

A polyoxy linear carbon chain compound, prorocentrol (1), was isolated from cultured cells of the dinoflagellate Prorocentrum hoffmannianum, which produces a polyether carboxylic acid, okadaic acid. The structure of 1 was elucidated by detailed analyses of 2D NMR spectra. Compound 1 possesses 30 hydroxy groups, 1 ketone, and 8 double bonds on the C65-linear carbon chain. Its partial relative configuration was deduced by the proton−proton and long-range carbon−proton coupling constants, and compound 1 showed moderate cytotoxicity and antidiatom activity.