The molecule is a 1-phosphatidyl-1D-myo-inositol 3,4-bisphosphate(5-) in which the phosphatidyl acyl groups at positions 1 and 2 are both specified as hexadecanoyl (palmitoyl). It is a conjugate base of a 1,2-dihexadecanoyl-sn-glycero-3-phospho-(1D-myo-inositol-3,4-bisphosphate).
[(1S,2S,3S,4R,5R,6S)-3-[[(2R)-2,3-di(hexadecanoyloxy)propoxy]-oxidophosphoryl]oxy-2,4,5-trihydroxy-6-phosphonatooxycyclohexyl] phosphate