2-hydroxy-N'-[(E)-(2-hydroxynaphthalen-1-yl)methylidene]benzohydrazide

NSAH is a reversible and competitive nonnucleoside ribonucleotide reductase (RR) inhibitor, with cell-free IC50 of 32 μM and cell-based IC50 of ~250 nM, respectively[1].

NSAH is a cell penetrant, potent and selective nonnucleoside reversible inhibitor of large subunit (hRRM1) of hRR (human ribonucleotide reductase). NSAH binds to catalytic site of hRRM1. It inhibits hRR in cells. NSAH exhibit potent cytotoxicity toward cancer cells, while demonstrated very moderate toxicity against normal blood progenitor cells.

[1] Md Faiz Ahmad, et al. Potent competitive inhibition of human ribonucleotide reductase by a nonnucleoside small molecule. Proc Natl Acad Sci U S A. 2017 Aug 1;114(31):8241-8246. DOI:10.1073/pnas.1620220114