(±)-Anatoxin A fumarate is a natural alkaloid isolated from freshwater cyanobacterium. It is a potent nicotinic receptor agonist and exhibits Ki values of 1.25 nM and 1.84 μM for binding to putative α4β2-type nAChR and α7-type nAChR in rat brain membranes, respectively. (±)-Anatoxin A fumarate stimulates [3H]-dopamine release from rat striatal synaptosomes with EC50 of 134 nM.