9Z-Octadecenyl phosphate ammonium salt (ODP) is a fatty alcohol phosphate analog of oleoyl-LPA. It does not activate or inhibit Ca2+-mobilization in LPA1-3 expressing RH7777 cells. However it potentiates the agonist activity of oleoyl-LPA on LPA receptor expressing cells.G.G. Durgam et al. “Synthesis Structure-Activity Relationships and Biological Evaluation of Fatty Alcohol Phosphates as Lysophosphatidic Acid Receptor Ligands Activators of PPAR? and Inhibitors of Autotaxin†J. Med. Chem. 2005 48 4919-4930