137993-59-0

2'-DEOXY-5-[3-[[[(3',6'-DIHYDROXY-3-OXOSPIRO[ISOBENZOFURAN-1(3H),9'-[9H]XANTHEN]-5-YL)AMINO]THIOXOMETHYL]AMINO]-1-PROPYNYL]URIDINE 5'-(TETRAHYDROGEN TRIPHOSPHATE)