[{"from": "human", "value": "Describe this molecule. [C][N][Branch2][Ring2][=N][C][=Branch1][C][=O][N][C@][Branch2][Ring1][=Branch1][S][C][=Branch1][Ring2][=N][Ring1][Branch1][C][=C][Branch1][#Branch2][C][=C][C][=Branch1][Ring2][=C][Ring1][=Branch1][F][F][Branch1][Branch1][C][C][C][N][C][=C][C][=C][C][=C][Ring1][=Branch1][O][C]"}, {"from": "gpt", "value": "The molecule is a potent Kinesin Spindle Protein (KSP) inhibitor that caused marked tumor regression in preclinical models of human solid tumors and human leukemias, often leading to durable responses."}]