The molecule is a ceramide that is the N-stearoyl (octadecanoyl) derivative of 4-hydroxyeicosasphinganine. It is a C20 phytoceramide and a N-stearoyl-sphingoid base.
N-[(2S,3S,4R)-1,3,4-trihydroxyicosan-2-yl]octadecanamide