[{"from": "human", "value": "Create a molecule that satisfies the conditions outlined in the description. The molecule appears as a white crystalline solid. Shipped as either a solid or liquid. Soluble in water and less dense than water. Corrosive to metals and tissue."}, {"from": "gpt", "value": "[C][/C][=C][/C][=Branch1][C][=O][O]"}]