[{"from": "human", "value": "Provide a description of this molecule. [C][C@][C][C][C@@H1][Branch2][Ring2][=Branch1][C][C@H1][Ring1][=Branch1][C][C][C@@H1][C@@H1][Ring1][#Branch2][C][C][C@H1][C@][Ring1][=Branch1][C@H1][Branch1][Ring2][O][Ring1][Ring1][C][C@@H1][Ring1][=Branch1][C][=C][O][C][=Branch1][C][=O][C][=C][Ring1][#Branch1][O]"}, {"from": "gpt", "value": "The molecule is a steroid lactone that has been used in the treatment of preeclampsia. A synthetic bufadienolide it is an antagonist of marinobufagenin (MBG) and differs from it by replacement of its 5beta-OH and 13beta-Me groups by hydrogen. It is a steroid lactone and an epoxy steroid. It is functionally related to a bufanolide."}]