[{"from": "human", "value": "Provide a description of this molecule. [C][C][Branch1][C][C][C][=C][N][=C][Branch1][Branch1][C][=C][Ring1][=Branch1][S][=Branch1][C][=O][=Branch1][C][=O][N][C][=C][Branch2][Ring1][P][C][=Branch2][Ring1][=Branch2][=N][C][=Branch1][Ring2][=N][Ring1][=Branch1][C][=C][C][=Branch1][=Branch1][=N][C][=C][Ring1][=Branch1][C][=N][N][N][=N][Ring1][Branch1][O][C][C][O][O][C][=C][C][=C][C][=C][Ring1][=Branch1][O][C]"}, {"from": "gpt", "value": "The molecule is an intravenous endothelin receptor A/B antagonist. Tezosentan was initially developed for vasodilation in patients with acute heart failure but studies have shown that it does not assist in the treatment of dyspnea or prevent cardiovascular events."}]