[{"from": "human", "value": "Describe this molecule. [C][C@H1][C@@H1][Branch2][Ring2][#C][C@@][Branch1][#Branch2][C][C@@H1][Branch1][Branch1][C][O][Ring1][Branch1][O][O][C@@H1][C@@H1][Ring1][O][O][C@H1][C][C@H1][Branch2][Ring1][=Branch1][C@@H1][Branch1][=N][O][C@@H1][Ring1][=Branch1][C@H1][Branch1][Branch1][C@@H1][Ring1][O][O][C][C][C][=Branch1][C][=O][C][O][C]"}, {"from": "gpt", "value": "The molecule is a polycyclic ether comprising a central oxepine ring flanked by two fused tetrahydropyran rings together with a spiro-fused tetrahydrofuran ring. Corresponds to the JKLM ring fragment and epitope of ciguatoxin. It has a role as an epitope."}]