Question: Please describe this drug.
Constraint: The Molecule has the SMILES O=C([O-])CC(=O)C(=O)O.
Answer: A dicarboxylic acid ketone that is an important metabolic intermediate of the CITRIC ACID CYCLE. It can be converted to ASPARTIC ACID by ASPARTATE TRANSAMINASE.
{#Question|Q!}: {quest#}
{#Constraint:|Description:|!} The {#Molecule|Compound|Chemical!} {#has the|can be represented with the!} {SMILES__description} {SMILES#}.
{#Answer|Result|Answer!}: {answ#}
O=C([O-])CC(=O)C(=O)O
C(C(=O)C(=O)O)C(=O)[O-]
4-hydroxy-3,4-dioxobutanoate
Please describe this drug.