Acetylcholine

**Definition:** A neurotransmitter found at neuromuscular junctions, autonomic ganglia, parasympathetic effector junctions, a subset of sympathetic effector junctions, and at many sites in the central nervous system.

**Tree numbers:** - D02.092.211.111

**Synonyms:** - 2-(Acetyloxy)-N,N,N-trimethylethanaminium