[{"from": "human", "value": "Design a molecule that meets the criteria outlined in the description. The molecule is a triterpene consisting of hopane having a C=C double bond at the 21-position. It has a role as a bacterial metabolite. It derives from a hydride of a hopane."}, {"from": "gpt", "value": "[C][C][=Branch2][Branch1][Ring1][=C][C][C][C@][Branch2][Ring2][O][C@H1][Ring1][Branch1][C][C][C@@][Branch2][Ring1][P][C@@H1][Ring1][=Branch1][C][C][C@H1][C@][Ring1][=Branch1][Branch2][Ring1][Ring2][C][C][C@@H1][C@@][Ring1][=Branch1][Branch1][O][C][C][C][C][Ring1][=Branch1][Branch1][C][C][C][C][C][C][C][C]"}]