N-tetracosanoyl-D-erythro-sphingosine
(2S,3R,4E)-2-(N-stearoylamino)-4-octadecene-1,3-diol
(2S,3R,4E)-2-azido-3-benzoyl-1-(triphenylmethyl)-4-octadecene-1,3-diol
(2S,3R,4E)-2-Azido-3-(pivaloyloxy)-1-(triphenylmethyloxy)-4-octadecen
(2S,3R,4E)-2-Azido-3-(tert-butyldimethylsilyloxy)-1-(pivaloyloxy)-4-octadecen