NCIt definition : An acyclic nucleotide phosphonate prodrug and polymerase inhibitor that can potentially
be used for its antineoplastic activity in the treatment of lymphoma in dogs. Upon
administration, rabacfosadine is hydrolyzed intracellularly to 9-(2-phosphonylmethoxyethyl)-N6-cyclopropyl-2,
6-diaminopurine (cPrPMEDAP) and subsequently deaminated to 9-(2-phosphonylmethoxyethyl)
guanine (PMEG) and phosphorylated to PMEG diphosphate (PMEGpp). PMEGpp binds to and
inhibits DNA polymerases. This inhibits DNA synthesis, resulting in S phase arrest
and induction of apoptosis.;