The molecule is an anionic C20 phospholipid obtained by deprotonation of the phosphate OH groups and protonation of the amino group of C20 phytosphingosine 1-phosphate; major species at pH 7.3. It derives from a C20 phytosphingosine(1+). It is a conjugate acid of a C20 phytosphingosine 1-phosphate.
[(2S,3S,4R)-2-azaniumyl-3,4-dihydroxyicosyl] phosphate