1-(1,2-dihexadecanoylphosphatidyl)inositol-3,4-phosphate triammonium salt Dipalmitoy-L-alpha-phosphatidylinositol-3,4-biphosphate pentaammonium salt PI(3,4)P2 5NH4 PI-3,4-P2, 5NH4 PI-3,4-P2, ammonium