[{"from": "human", "value": "Provide a brief overview of this molecule. [C][=C][Branch1][Ring2][C][C][O][C][O]"}, {"from": "gpt", "value": "The molecule is a glycol that is 1,4-butanediol substituted at position 2 by a methylidene group. It is a glycol, a primary allylic alcohol and a homoallylic alcohol."}]