Astrogorgiadiol and astrogorgin, inhibitors of cell division in fertilized starfish eggs, from a gorgonian astrogorgia sp.

A novel secosterol, astrogorgiadiol(1), a known diterpene ophirin(2) and a closely related diterpene, astrogorgin(3), have been isolated from a gorgonian Astrogorgia sp. as inhibitors of cell division in fertilized starfish eggs.