Phosphonosphingoglycolipid,a novel sphingolipid from the viscera of Turbo cornutus

A novel lipid which contained long-chain base, fatty acid, galactose and N-methylaminoethylphosphonic acid in an equimolar was isolated from the viscera of Turbo cornutus.The methods used for the structural elucidation of this lipid were partial acid hydrolysis, alkaline hydrolysis, periodate oxidation and Smith degradation. The structure of breakdown products were mainly identified by combined gas chromatography and mass spectrometry.The structure of the novel lipid was determined to be 1-O-[6′-O-(N-methylaminoethylphosphonyl) galactopyranosyl] ceramide.Mass spectra of galactose-N-methylaminoethylphosphonate and glycerol-N-methylaminoethylphosphonate are given.