Question: Which USAN substem can this drug or clinical candidate name be matched with?
Constraint: The Chemical can be represented with the SMILES O=C1CN(/N=C/c2ccc([N+](=O)[O-])o2)C(=O)[N-]1.[Na+].
Answer: -toin
{#Question|Q!}: {quest#}
{#Constraint:|Description:|!} The {#Molecule|Compound|Chemical!} {#has the|can be represented with the!} {SMILES__description} {SMILES#}.
{#Answer|Result|Answer!}: {answ#}
O=C1CN(/N=C/c2ccc([N+](=O)[O-])o2)C(=O)[N-]1.[Na+]
O=C1CN(/N=C/c2ccc([N+](=O)[O-])o2)C(=O)[N-]1.[Na+]
sodium;1-[(E)-(5-nitrofuran-2-yl)methylideneamino]imidazolidin-3-ide-2,4-dione
Which USAN substem can this drug or clinical candidate name be matched with?
-toin