STRUCTURAL DETERMINATION OF TWO LIPIDS ISOLATED FROM THE SEA URCHIN Echinometra lucunter

Specimens of the sea urchin Echinometra lucunter were collected at Dakar (Senegal). Fresh sea urchins were exhaustively treated with CHCl3-MeOH 1:1 (v/v). After evaporation of solvent the oily residue (1, 92 g) was passed through an RP 18 column. The CHCl3 soluble fraction has been analyzed through spectroscopic means (NMR, electrospray ionization mass spectrometry). It has been shown to contain the two sterol derivatives lucunterperacetate (1) and peroxylucunterine (2).