Task: Answer the following question about the molecule with SMILES CCC(C)C1(CC)C(=O)[N-]C(=O)NC1=O.[Na+].
Request: What is the definition of this compound's USAN stem?
Completion: barbituric acid derivatives
Task: Answer the following question about the molecule with {SMILES__description} {SMILES#}.
{#Description|Question|Request!}: {quest#}
{#Result|Answer|Completion!}: {answ#}
CCC(C)C1(CC)C(=O)[N-]C(=O)NC1=O.[Na+]
CCC(C)C1(CC)C(=O)[N-]C(=O)NC1=O.[Na+]
sodium;5-butan-2-yl-5-ethylpyrimidin-3-ide-2,4,6-trione
What is the definition of this compound's USAN stem?