The molecule is an N-acyl-4-hydroxy-15-methylhexadecasphinganine-1-phosphocholine in which the acyl group has 18 carbons and 0 double bonds and is 2-hydroxylated. It is a N-acyl-4-hydroxy-15-methylhexadecasphinganine-1-phosphocholine and a 15-methylhexadecaphytosphingosine.
[(2S,3S,4R)-3,4-dihydroxy-2-(2-hydroxyoctadecanoylamino)-15-methylhexadecyl] 2-(trimethylazaniumyl)ethyl phosphate