[{"from": "human", "value": "Provide a brief overview of this molecule. [C][C][N][C][=Branch2][Ring2][C][=N][C@H1][Branch2][Ring1][=Branch1][C@H1][C@][Ring1][=Branch1][Branch1][Branch2][C][Ring1][=Branch2][Branch1][C][O][O][N][C][=Branch1][Ring2][=N][Ring1][Branch2][N][C][O][C][=Branch1][C][=O][N][N]"}, {"from": "gpt", "value": "The molecule is a carbamate alkaloid neurotoxin isolated from marine dinoflagellates and cyanobacteria that inhibits nerve conduction by blocking neuronal voltage-gated sodium channels in excitable cells. Exposure usually occurs through ingestion of contaminated shellfish, resulting in an illness called paralytic shellfish poisoning."}]