[{"from": "human", "value": "Design a molecule that meets the criteria outlined in the description. The molecule is a carotenoid ether that is the 3,4-dihydro derivative of the tetraterpenoid spheroidene. It has a role as a bacterial metabolite."}, {"from": "gpt", "value": "[C][C][=Branch2][Branch1][O][=C][C][C][/C][=Branch2][Branch1][Ring1][=C][/C][C][/C][=Branch2][Ring2][O][=C][/C][=C][/C][=Branch2][Ring2][Ring1][=C][/C][=C][/C][=C][Branch1][C][\\C][/C][=C][/C][=C][Branch1][C][\\C][/C][=C][/C][=C][Branch1][C][\\C][/C][C][C][C][Branch1][C][C][Branch1][C][C][O][C][/C][/C][/C][C]"}]