[{"from": "human", "value": "What can you tell me about this molecule? [O-1][99Tc][=Branch1][C][=O][=Branch1][C][=O][=O].[Na+1]"}, {"from": "gpt", "value": "The molecule is a Radioactive Diagnostic Agent. The mechanism of action of technetium tc-99m sodium pertechnetate is as a Radiopharmaceutical Activity."}]