[{"from": "human", "value": "Based on the given information, design a molecule that meets the desired specifications. The molecule is a corrosive, colorless gas at room temperature. Selenium hexafluoride is only slightly soluble in water. It does not occur naturally in the environment. Selenium hexafluoride is used as a gaseous electrical insulator."}, {"from": "gpt", "value": "[F][Se][Branch1][C][F][Branch1][C][F][Branch1][C][F][Branch1][C][F][F]"}]