[{"from": "human", "value": "Create a molecule that satisfies the conditions outlined in the description. The molecule is the dialdehyde that is the smallest possible and which consists of ethane having oxo groups on both carbons. It has a role as a pesticide, an agrochemical, an allergen and a plant growth regulator."}, {"from": "gpt", "value": "[C][=Branch1][C][=O][C][=O]"}]