[{"from": "human", "value": "Design a molecule that meets the criteria outlined in the description. The molecule is a radioactive phosphate salt that distributes readily into intra and extracellular compartments and accumulates in rapidly dividing cancer cells leading to cell death. (NCI)"}, {"from": "gpt", "value": "[O][32P][=Branch1][C][=O][Branch1][C][O][O-1].[Na+1]"}]