The molecule with the SMILES S=c1nc[nH]c2nc[nH]c12 shows no clinical toxicity.
The molecule with the {SMILES__description} {#representation of |!}{SMILES#} {#shows|exhibits|displays!} {clinical_toxicity#no &NULL}{clinical_toxicity__names__noun}.
3,7-dihydropurine-6-thione