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Flurocitabine is a fluorinated anlydride analog of cytosine arabinoside, partially hydrolysecl in vivo into two active antitumor substances (arabinosyl-tluorocytosine (ara-FC) and arabinosyl-fluorouracil (ara-FU)). Flurocitabine has antitumor activity during phase I studies in acute leukemia and solid tumors.
Fludarabine triphosphate (F-ara-ATP) trisodium, the active metabolite of Fludarabine, is a potent, noncompetitive and specific inhibitor of DNA primase, with an IC50 of 2.3 μM and a Ki of 6.1 μM. Fludarabine triphosphate trisodium inhibits DNA synthesis by blocking DNA primase and primer RNA formation. Fludarabine triphosphate trisodium inhibits ribonucleotide reductase and DNA polymerase and ultimately leads to cellular apoptosis.
Fludarabine triphosphate (F-ara-ATP), the cytotoxic metabolite of Fludarabine phosphate, inhibits ribonucleotide reductase and DNA polymerase and ultimately leads to cellular apoptosis.
Ribavirin 5'-monophosphate dilithium is an active form of ribavirin that inhibits IMP dehydrogenase, and ribavirin itself is a broad-spectrum antiviral agent.
Pseudouridine 5'-OTBDPS (5-(5-O-TBDPS-β-D-ribofuranosyl)uracil) is an intermediate of Pseudouridine. PROTACs are inducers of ubiquitination-mediated degradation of cancer-promoting proteins.