[{"from": "human", "value": "Synthesize a molecule that matches the given characteristics. The molecule is an oxacycle."}, {"from": "gpt", "value": "[C][C@@H1][C][C][C@@H1][Branch2][Ring1][#Branch2][C][Branch2][Ring1][C][O][C][=C][Ring1][Branch2][C][=C][Branch1][Branch2][C][=Branch1][Ring2][=C][Ring1][=Branch1][C][O][Branch1][C][C][C][O]"}]