What is "lysophosphatidylinositol"

n. (context organic chemistry English) Any derivative of phosphatidylinositol in which one or both acyl derivatives have been removed by hydrolysis

Lysophosphatidylinositol (LPI), or L-α-lysophosphatidylinositol, is an endogenous lysophospholipid and endocannabinoid neurotransmitter. LPI, along with its 2-arachidonoyl- derivative, 2-arachidonoyl lysophosphatidylinositol (2-ALPI), have been proposed as the endogenous ligands of GPR55.