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