[{"from": "human", "value": "Describe this molecule. [C][C][Branch1][C][C][C][C][C][C@H1][Branch2][Ring2][Ring2][C@H1][C][C][C@@H1][C@@][Ring1][Branch1][Branch2][Ring1][=Branch2][C][C][C@H1][C@H1][Ring1][=Branch1][C][C][C@@H1][C@@][Ring1][=Branch1][Branch1][#Branch2][C][=C][C][=Branch1][C][=O][C][Ring1][#Branch1][C][C][C][=Branch1][C][=O][O][C]"}, {"from": "gpt", "value": "The molecule is a steroid ester that is methyl (5alpha)-cholest-1-en-21-oate substituted by an oxo group at position 3. Isolated from Hainan soft coral Dendronephthya studeri, it exhibits antitumour activity. It has a role as a coral metabolite. It is a cholestanoid, a steroid ester and a 3-oxo-Delta(1) steroid. It derives from a hydride of a 5alpha-cholestane."}]