Task: Answer the following question about the molecule with SMILES O=C(Nc1ccc(-c2nnn[nH]2)cc1)c1ccc(-c2nnn[nH]2)cc1.
Request: Which USAN substem can this drug or clinical candidate name be matched with?
Result: -ast
Task: Answer the following question about the molecule with {SMILES__description} {SMILES#}.
{#Description|Question|Request!}: {quest#}
{#Result|Answer|Completion!}: {answ#}
O=C(Nc1ccc(-c2nnn[nH]2)cc1)c1ccc(-c2nnn[nH]2)cc1
O=C(Nc1ccc(-c2nnn[nH]2)cc1)c1ccc(-c2nnn[nH]2)cc1
4-(1H-1,2,3,4-tetrazol-5-yl)-N-[4-(1H-1,2,3,4-tetrazol-5-yl)phenyl]benzamide
Which USAN substem can this drug or clinical candidate name be matched with?