[{"from": "human", "value": "Provide a brief overview of this molecule. [C][C][=Branch1][C][=O][C@][Branch2][Ring2][Ring1][C][C][C@@H1][C@@][Ring1][Branch1][Branch2][Ring1][=Branch2][C][C][C@H1][C@H1][Ring1][=Branch1][C][C][=C][C@@][Ring1][=Branch1][Branch1][#Branch2][C][C][C][=Branch1][C][=O][C][Ring1][#Branch1][C][C][O]"}, {"from": "gpt", "value": "The molecule is a C21-steroid that is pregnane which contains a double bond between positions 5 and 6 and is substituted by oxo groups at positions 3 and 20 as well as a hydroxy group at position 17. It is a 20-oxo steroid, a 3-oxo-Delta(5)-steroid, a C21-steroid, a 17alpha-hydroxy steroid, a 17alpha-hydroxy-C21-steroid and a tertiary alpha-hydroxy ketone. It derives from a hydride of a pregnane."}]