[{"from": "human", "value": "Based on the given information, design a molecule that meets the desired specifications. The molecule is an organic heterotricyclic compound and a paralytic shellfish toxin. It has a role as a marine metabolite."}, {"from": "gpt", "value": "[C][C][N][C][=Branch2][Ring2][#Branch2][=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][S][=Branch1][C][=O][=Branch1][C][=O][O][N]"}]