The molecule is a cationic sphingoid that is the conjugate acid of 4-hydroxysphing-8-enine, obtained by protonation of the primary amino function; major species at pH 7.3. It is a conjugate base of a 4-hydroxy-8-sphingenine.
[(E,2S,3S,4R)-1,3,4-trihydroxyoctadec-8-en-2-yl]azanium