[{"from": "human", "value": "Describe this molecule. [C][C@@H1][C][C][C@][Branch1][O][C@@H1][Branch1][#Branch1][C][C][C][O][Ring1][=Branch1][C][O][C@@H1][Ring1][N][C@@H1][Branch1][C][C][C][C@@H1][Branch2][=Branch1][S][C@@H1][C][=Branch1][C][=C][C@H1][Branch2][=Branch1][=Branch1][C@H1][C@H1][Branch1][Ring2][O][Ring1][#Branch1][C][C][C@][Branch1][Ring2][O][Ring1][#Branch1][C][C][C@@H1][Branch1][Ring2][O][Ring1][=Branch1][/C][=C][/C@@H1][Branch1][C][C][C@@H1][C][C][=Branch2][Ring2][C][=C][C@@][Branch1][Ring2][O][Ring1][=Branch1][C@@H1][Branch2][Ring1][=Branch1][C][C][C@H1][Branch1][Ring2][O][Ring1][#Branch1][C][C@][Branch1][C][C][Branch1][=Branch1][C][=Branch1][C][=O][O][O][O][C][O][O]"}, {"from": "gpt", "value": "The molecule is a ketal that is a marine toxin structurally related to okadaic acid. Produced by dinoflagellates it is known to accumulate in shellfish and cause diarrhoeic shellfish poisoning. It is an inhibitor of serine/threonine protein phosphatases 1 (PP1) and PP2A and has been shown to promote cancer cell growth in tumour cell lines and animal models. It has a role as a toxin, an EC 3.1.3.16 (phosphoprotein phosphatase) inhibitor, a marine metabolite and an animal metabolite. It is functionally related to an okadaic acid."}]