Task: Answer the following question about the molecule with SMILES Nc1ccn([C@H]2C[C@H](O)[C@@H](CO)S2)c(=O)n1.
Description: Please describe this drug.
Answer: 4-Thio-2-deoxycytidine is an orally bioavailable 4-thio modified 2-deoxycytidine analog, with potential antineoplastic activity. Upon administration of 4-thio-2-deoxycytidine (TdCyd), this cytidine analog gets incorporated into DNA during replication and inhibits the activity of DNA methyltransferase 1 (DNMT1), which blocks DNA hypermethylation. This results in DNMT1 depletion, hypomethylation of DNA, and the reactivation of tumor suppressor genes that were silenced by hypermethylation; this results in antitumor activity and an inhibition of tumor cell proliferation.
Task: Answer the following question about the molecule with {SMILES__description} {SMILES#}.
{#Description|Question|Request!}: {quest#}
{#Result|Answer|Completion!}: {answ#}
Nc1ccn([C@H]2C[C@H](O)[C@@H](CO)S2)c(=O)n1
C1[C@@H]([C@H](S[C@H]1N2C=CC(=NC2=O)N)CO)O
4-amino-1-[(2R,4S,5R)-4-hydroxy-5-(hydroxymethyl)thiolan-2-yl]pyrimidin-2-one
Please describe this drug.