The molecule is a 1-phosphatidyl-1D-myo-inositol 3,5-bisphosphate(5-) arising from deprotonation of all five free phosphate OH groups of 1,2-dipalmitoyl-sn-glycero-3-phospho-(1'-D-myo-inositol-3',5'-bisphosphate); major species at pH 7.3. It is a conjugate base of a 1,2-dipalmitoyl-sn-glycero-3-phospho-(1'D-myo-inositol-3',5'-bisphosphate).
[(1S,2R,4R,5R)-3-[[(2R)-2,3-di(hexadecanoyloxy)propoxy]-oxidophosphoryl]oxy-2,4,6-trihydroxy-5-phosphonatooxycyclohexyl] phosphate