(2S,3R,4E)-2-acylamino-1,3-octadec-4-enediol (2S,3R,4E)-2-acylaminooctadec-4-ene-1,3-diol 104404-17-3 CMC_12037 CMC_12704 Ceramide (Egg) octadecanamide, N-[(1S,2R,3E)-2-hydroxy-1-(hydroxymethyl)-3-heptadecenyl]-