Question: Please describe this drug.
 The Chemical can be represented with the SMILES [13NH3].
Result: Ammonia n-13 is a Radioactive Diagnostic Agent. The mechanism of action of ammonia n-13 is as a Radiopharmaceutical Activity.
{#Question|Q!}: {quest#}
{#Constraint:|Description:|!} The {#Molecule|Compound|Chemical!} {#has the|can be represented with the!} {SMILES__description} {SMILES#}.
{#Answer|Result|Answer!}: {answ#}
[13NH3]
[13NH3]
azane
Please describe this drug.