L-threo Lysosphingomyelin (d18:1) (L-threo-Sphingosylphosphorylcholine) is an endogenous bioactive sphingolipid. L-threo Lysosphingomyelin (d18:1) is a potent S1P receptor agonist with EC 50 s of 19.3, 131.8, and 313.3 nM for hS1P 1 , hS1P 3 , and hS1P 2 , respectively Form:Solid IC50& Target:S1PR1 19.3 nM (EC 50 , human) S1PR3 131.8 nM (EC 50 , human) S1PR2 313.3 nM (EC 50 , human)