[{"from": "human", "value": "Please give me some details about this molecule. [C][C@H1][Branch2][Ring2][#C][C][C][=Branch1][C][=O][O][C@H1][Branch1][C][C][C][C][=Branch1][C][=O][O][C@H1][Branch1][C][C][C][C][=Branch1][C][=O][O][C@H1][Branch1][C][C][C][C][=Branch1][C][=O][O][C@H1][Branch1][C][C][C][C][=Branch1][C][=O][O-1][O]"}, {"from": "gpt", "value": "The molecule is a hydroxy monocarboxylic acid anion resulting from the deprotonation of the carboxy group of (3R)-3-{[(3R)-3-{[(3R)-3-{[(3R)-3-{[(3R)-3-hydroxybutanoyl]oxy}butanoyl]oxy}butanoyl]oxy}butanoyl]oxy}butanoate. A pentamer of (3R)-hydroxybutanoic acid; major microspecies at pH 7.3. It is functionally related to a (R)-3-hydroxybutyrate. It is a conjugate base of a (3R)-3-{[(3R)-3-{[(3R)-3-{[(3R)-3-{[(3R)-3-hydroxybutanoyl]oxy}butanoyl]oxy}butanoyl]oxy}butanoyl]oxy}butanoic acid."}]