1-(2',3'-Epithio-2',3'-dideoxy-beta-D-ribofuranosyl)thymine 5'-triphosphate 152158-10-6 2',3'-Dideoxy-2',3'-epithio-5-methyluridine 5'-(tetrahydrogen triphosphate) Uridine 5'-(tetrahydrogen triphosphate), 2',3'-dideoxy-2',3'-epithio-5-methyl- rtTTP