ChEBI: 2-O-acetyl-1-O-hexadecyl-sn-glycero-3-phosphocholine is a 2-acetyl-1-alkyl-sn-glycero-3-phosphocholine betaine which has hexadecyl as the alkyl group. PAF is a potent phospholipid activator and mediator of many leukocyte functions, including platelet aggregation, inflammation, and anaphylaxis. It has a role as a beta-adrenergic antagonist, an antihypertensive agent, a bronchoconstrictor agent, a hematologic agent and a vasodilator agent.