1-Oleoyl-2-hydroxy-sn-glycero-3-phosphoethanolamine-d31 is the deuterium-labeled form of 1-Oleoyl-2-hydroxy-sn-glycero-3-phosphoethanolamine. The compound 1-oleoyl-sn-glycero-3-phosphoethanolamine (LysoPE 18:1) is a lysophosphatidylethanolamine involved in phospholipid metabolism and modulates cellular signaling pathways by targeting cell membrane receptors such as G protein-coupled receptors. It may activate mitogen-activated protein kinase (MAPK) signaling, facilitating cell migration, regulating inflammatory responses and lipid metabolism, exhibiting both pro-inflammatory and anti-inflammatory activities. This compound is primarily utilized in biomarker screening for metabolic disorders, including non-alcoholic fatty liver disease and obesity, as well as in studying the roles of lysophospholipids in maintaining cell membrane homeostasis and signal transduction.