[{"from": "human", "value": "Please give me some details about this molecule. [O][=Se][=O]"}, {"from": "gpt", "value": "The molecule appears as a white or creamy-white volatile lustrous crystal or crystalline powder with a pungent sour smell. Melting point 340 deg C. Density 3.954 g / cm3. Toxic by ingestion and inhalation."}]