The molecule is a 1-phosphatidyl-1D-myo-inositol 4,5-bisphosphate(5-) obtained by deprotonation of the phosphate OH groups of 1-stearoyl-2-arachidonoyl-sn-glycero-3-phospho-1D-myo-inositol 4,5-bisphosphate; major species at pH 7.3. It is a conjugate base of a 1-stearoyl-2-arachidonoyl-sn-glycero-3-phospho-1D-myo-inositol 4,5-biphosphate.
[(1R,2S,3R,4R,5S,6R)-2,3,5-trihydroxy-4-[[(2R)-2-[(5Z,8Z,11Z,14Z)-icosa-5,8,11,14-tetraenoyl]oxy-3-octadecanoyloxypropoxy]-oxidophosphoryl]oxy-6-phosphonatooxycyclohexyl] phosphate