[{"from": "human", "value": "Create a molecule that satisfies the conditions outlined in the description. The molecule is a member of the class of chloroethanes that is ethane substituted by chloro groups at positions 1, 1, 2 and 2."}, {"from": "gpt", "value": "[C][Branch1][=Branch1][C][Branch1][C][Cl][Cl][Branch1][C][Cl][Cl]"}]