Anandamide neurotransmitter. Computed-generated space-filling model of a molecule of the neurotransmitter anandamide. Also known as arachidonoylethanolamide or AEA, this neurotransmitter acts on receptors in the brain and other areas of the nervous system that are affected by the use of cannabis. AEA plays a role in memory, and is being investigated for other uses such as pain relief. The molecule's chemical formula is C22.H37.N.O2. The atoms are colour-coded: carbon (cream), hydrogen (white), nitrogen (blue) and oxygen (red).