[{"from": "human", "value": "Could you give me a brief overview of this molecule? [C][O][C][=C][C][=C][C][=C][Ring1][=Branch1][O][C][=C][Branch2][Ring1][Ring1][N][=C][Branch1][#Branch1][N][=C][Ring1][=Branch1][O][C][C][=N][C][=C][C][=N][Ring1][=Branch1][N-1][S][=Branch1][C][=O][=Branch1][C][=O][/C][=C][/C][=C][C][=C][C][=C][Ring1][=Branch1].[K+1]"}, {"from": "gpt", "value": "The molecule is an orally active synthetic substituted phenylethenesulfonamide. As a selective endothelin A receptor antagonist, YM598 inhibits endothelin-mediated mechanisms involved in tumor cell growth and progression, angiogenesis, and metastasis. (NCI04)"}]