[{"from": "human", "value": "Describe this molecule. [C][Branch1][=Branch1][C][=Branch1][C][=O][O-1][C][Branch1][#Branch1][C][C][=Branch1][C][=O][O-1][Branch1][=Branch1][C][=Branch1][C][=O][O][O].[Mg+2]"}, {"from": "gpt", "value": "The molecule is a magnesium salt composed of magnesium and dibasic citrate ions in a 1:1 ratio. It has a role as a laxative and a food acidity regulator. It contains a 3-carboxy-3-hydroxypentanedioate."}]