https://doi.org/10.1351/goldbook.P04558
Phosphoric diesters, @E02219@ of @P04550@, generally having a polar head group (OH or NH2) on the esterified alcohol which typically is 2-aminoethanol, choline, glycerol, inositol, serine. The term includes @L03494@, @C00938@. E.g.
P04558.png