The molecule is an N-acyl-4-hydroxy-15-methylhexadecasphinganine-1-phosphocholine in which the acyl group has 17 carbons and 0 double bonds. It derives from a 15-methylhexadecaphytosphingosine.
[(2S,3S,4R)-2-(heptadecanoylamino)-3,4-dihydroxy-15-methylhexadecyl] 2-(trimethylazaniumyl)ethyl phosphate