[{"from": "human", "value": "Please give me some details about this molecule. [N+1][=Branch1][C][=O][Branch1][C][O-1][O-1].[N+1][=Branch1][C][=O][Branch1][C][O-1][O-1].[Ba+2]"}, {"from": "gpt", "value": "The molecule is a chemical compound of barium. It is used in explosives, to produce barium oxide, in vacuum tubes, and to produce green fire in pyrotechnics. Barium is a metallic alkaline earth metal with the symbol Ba, and atomic number 56. It never occurs in nature in its pure form due to its reactivity with air, but combines with other chemicals such as sulfur or carbon and oxygen to form barium compounds that may be found as minerals. Nitrite is a toxic compound known to cause methemoglobinemia. (L1137, L214, 408, L207)"}]