[{"from": "human", "value": "Describe this molecule. [C][Branch1][P][C][N][Branch1][#Branch1][C][C][=Branch1][C][=O][O-1][C][C][=Branch1][C][=O][O-1][N][Branch1][#Branch1][C][C][=Branch1][C][=O][O-1][C][C][=Branch1][C][=O][O-1].[Na+1].[Na+1].[Ca+2]"}, {"from": "gpt", "value": "The molecule is a metal ion chelator used to reduce blood concentrations and depot stores of lead from the body. It is on the World Health Organization Model List of Essential Medicines.  Edetate calcium disodium was granted FDA approval on 16 July 1953."}]