[{"from": "human", "value": "Use the given information to create a molecule that fulfills the desired purpose. The molecule is a diol that is ethene substituted at positions 1 and 2 by hydroxy groups (the Z-geoisomer). It is an enol and a diol. It is functionally related to an ethene. It is a tautomer of a glycolaldehyde."}, {"from": "gpt", "value": "[C][=Branch1][Ring1][=C][\\O][\\O]"}]