[{"from": "human", "value": "Based on the given information, design a molecule that meets the desired specifications. The molecule is the simplest member of the class of methanediols that is methane in which two of the hydrogens have been substituted by hydroxy groups. It is a member of methanediols, an aldehyde hydrate and a one-carbon compound."}, {"from": "gpt", "value": "[C][Branch1][C][O][O]"}]