[{"from": "human", "value": "Describe this molecule. [C][N][Branch1][C][C][C][C@H1][C][N][=C][Branch1][=C][N][Ring1][Branch1][O][P][=Branch1][C][=O][Branch1][C][O][O][C][N]"}, {"from": "gpt", "value": "The molecule is a natural organophosphate found in <i>Anabaena flos-aquae</i>. It irreversibly inhibits acetylcholinesterase (AChE), similar to organophosphorous and carbamate insecticides and some chemical warfare agents. When AChE is inhibited, the neurotransmitter acetylcholine is no longer hydrolyzed in the synapse, the postsynaptic membrane cannot be repolarized, and nerve influx is blocked. Anatoxin-a(s) is highly toxic for mammals when the toxigenic cyanobacteria produce mass populations in drinking water (A3257)."}]