[{"from": "human", "value": "Based on the given information, design a molecule that meets the desired specifications. The molecule is the anhydrous, mesylate salt form of exatecan, a semisynthetic, water-soluble derivative of camptothecin, with antineoplastic activity. Upon administration, exatecan mesylate inhibits topoisomerase I activity by stabilizing the cleavable complex between topoisomerase I and DNA and inhibiting re-ligation of DNA breaks, thereby inhibiting DNA replication and triggering apoptotic cell death."}, {"from": "gpt", "value": "[C][C][C@@][Branch2][Branch1][=Branch1][C][=C][Branch1][#Branch1][C][O][C][Ring1][=Branch1][=O][C][=Branch1][C][=O][N][C][C][=C][C@H1][Branch2][Ring1][#C][C][C][C][=C][Ring1][=Branch1][C][=Branch1][#Branch2][=C][C][=Branch1][Branch1][=C][Ring1][=Branch1][C][F][N][=C][Ring1][#C][C][Ring2][Ring1][C][=C][Ring2][Ring1][O][N][O].[C][S][=Branch1][C][=O][=Branch1][C][=O][O]"}]