CAS: 142409-74-3

S4-(2-Cyanoethyl)-5'-o-(dimethoxytrityl)-4-thiothymidine is a DNA analog that inhibits the growth of tumor cells. It binds to purine nucleosides and prevents the synthesis of DNA and RNA, which can lead to cell death. S4-(2-Cyanoethyl)-5'-o-(dimethoxytrityl)-4-thiothymidine has been shown to inhibit the growth of tumor cells in vitro. It is an effective inhibitor of HIV replication in vitro, but it does not have any antiviral activity against other viruses. This drug is a modified form of thymidine, which is an important component of DNA.