The molecule is an N-acyl-D-galactosylsphingosine in which the ceramide N-acyl group is specified as stearoyl (octadecanoyl). It derives from an octadecanoic acid.
N-[(E,2S,3R)-3-hydroxy-1-[(3R,4S,5R,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxyoctadec-4-en-2-yl]octadecanamide