4′-Thiouridine
4′-Thiouridine (1-(4-Thio-beta-D-ribofuranosyl)uracil) is a thio analog of thymidine. 4′-Thiouridine can be used to synthesize 4'-thionucleosides with antiviral and anticancer activities. 4′-Thiouridine can be used for RNA-sequencing[3].