[{"from": "human", "value": "Please give me some details about this molecule. [C][C@@H1][C][C@H1][C@@H1][Branch2][Ring1][P][C][C@][Branch2][Ring1][O][C@H1][Branch1][Ring2][O][Ring1][=Branch1][C][C@H1][C@H1][Branch1][Ring2][O][Ring1][#Branch1][C][=Branch1][=Branch2][=C][C][=Branch1][C][=O][O][Ring1][Branch2][C][C][O][C@@H1][C@@H1][Ring2][Ring1][=Branch1][O][C@H1][C][C@@H1][C@][Branch2][Branch1][=N][C][C@@H1][C@@][Branch1][Ring2][O][Ring1][=Branch1][Branch2][Ring2][P][C][/C][=C][\\C@@H1][C@@H1][Branch1][Ring2][O][Ring1][=Branch2][C][C@@H1][C@@H1][Branch1][Ring2][O][Ring1][#Branch1][C][C@@H1][C@@][Branch1][Ring2][O][Ring1][#Branch1][Branch2][Ring1][Ring1][C@H1][Branch1][#C][C][C@H1][Branch1][Ring2][O][Ring1][#Branch1][C][C][=Branch1][C][=C][C][=O][O][C][C][Branch1][=C][O][C@@][Ring2][Ring2][Ring2][Branch1][=Branch1][C][C][Ring2][Ring2][=Branch2][C][C]"}, {"from": "gpt", "value": "The molecule is the first member of marine polycyclic ethers to be structurally elucidated and one of the most potent neurotoxins. The structural feature of this compound is a trans-fused polycyclic ether ring system with 23 stereocenters, which contains six-, seven-, and eight-membered ether rings, three carbon-carbon double bonds, one hydroxyl group, and two carbonyl groups  (A3250)."}]