Thymidine
![Skeletal formula of thymidine](/Images/godic/202501/08/Desoxythymidin.svg4744.png")
![Ball-and-stick model of the thymidine molecule](/Images/godic/202501/08/Thymidine_3D_ball4744.png")
Thymidine (deoxythymidine; other names deoxyribosylthymine, thymine deoxyriboside) is a pyrimidine deoxynucleoside. Deoxythymidine is the DNA nucleoside T, which pairs with deoxyadenosine (A) in double-stranded DNA. In cell biology it is used to synchronize the cells in G1/early S phase.