[{"from": "human", "value": "Describe this molecule. [N+1][=Branch1][C][=O][Branch1][C][O-1][O-1].[N+1][=Branch1][C][=O][Branch1][C][O-1][O-1].[Ca+2]"}, {"from": "gpt", "value": "The molecule is a nitrate of calcium. It is mainly used as a component in fertilizers. Nitrite is a toxic compound known to cause methemoglobinemia. (L1137, L1621)"}]