Task: Answer the following question about the molecule with SMILES Cn1cnc([N+](=O)[O-])c1Sc1ncnc2[n-]cnc12.[Na+].
Description: Please describe this drug.
Result: Azathioprine Sodium is the sodium salt form of azathioprine, a pro-drug of purine analogue with immunosuppressive activity. Azathioprine is converted in vivo to its active metabolite 6-mercaptopurine (6-MP), which substitutes for the normal nucleoside and mistakenly gets incorporated into DNA sequences. This leads to inhibition of DNA, RNA, and protein synthesis. As a result, cell proliferation may be inhibited, particularly in lymphocytes and leukocytes.
Task: Answer the following question about the molecule with {SMILES__description} {SMILES#}.
{#Description|Question|Request!}: {quest#}
{#Result|Answer|Completion!}: {answ#}
Cn1cnc([N+](=O)[O-])c1Sc1ncnc2[n-]cnc12.[Na+]
CN1C=NC(=C1SC2=NC=NC3=C2N=C[N-]3)[N+](=O)[O-].[Na+]
sodium;6-(3-methyl-5-nitroimidazol-4-yl)sulfanylpurin-9-ide
Please describe this drug.