[{"from": "human", "value": "Provide a brief overview of this molecule. [C][C@][C][C][C@@H1][Branch2][Ring2][#C][C][C@H1][Ring1][=Branch1][C][C][C][C][Ring1][#Branch2][C@@H1][Branch2][Ring1][S][C][=Branch1][C][=O][C@][Branch2][Ring1][#Branch1][C@@][Ring1][#Branch1][Branch1][P][C][C][C@@H1][Ring1][Branch1][C][=C][O][C][=Branch1][C][=O][C][=C][Ring1][#Branch1][O][C][O][O]"}, {"from": "gpt", "value": "The molecule is a cardiotoxic bufanolide steroid secreted by the Argentine toad (Bufo arenarum). It blocks the sodium/potassium pump in heart tissue. (L1078)"}]