Petromyzonin, a hexahydrophenanthrene sulfate isolated from the larval sea lamprey (Petromyzon marinus L.).

A new hexahydrophenanthrene sulfate was identified from water conditioned with sea lamprey larvae ( Petromyzon marinus ) and named petromyzonin. Its structure was unequivocally elucidated on the basis of spectroscopic analyses including comparison with spectra of known compounds. The absolute configuration was determined by electronic circular dichroism.