<unk>  (GNT), formerly known as anatoxin-a(S) "Salivary", is a naturally occurring cyanotoxin commonly isolated from cyanobacteria (specifically of the genus Anabaena) and causes excess salivation in mammals via inhibition of acetylcholinesterase.<unk>  was first structurally characterized in 1989, and consists of a cyclic N-hydroxyguanine organophosphate with a phosphate ester moiety.
Guanitoxin
Ikitoxin
Saxitoxin
Eoxin
Agitoxin
Dortoxin
Phoratoxin
Amatoxin