[{"from": "human", "value": "Describe this molecule. [C][C][C][C][=Branch1][C][=O][C][=C][Branch1][#C][C@@H1][Branch1][=Branch1][O][C][Ring1][Branch1][=O][C][C][=Branch1][C][=O][O][O]"}, {"from": "gpt", "value": "The molecule is a tetronic acid derivative that is furan-2(5H)-one which is substituted at positions 3, 4, and 5 by butanoyl, hydroxy, and carboxymethyl groups, respectively (the S enantiomer). It has a role as an Aspergillus metabolite and a Penicillium metabolite. It is a butenolide, a carboxylic acid, an enol, a ketone and a tetronic acid derivative."}]