NSC727447 is an inhibitor of ribonuclease H (Rnase H) of HIV-1 and HIV-2. NSC727447 has little activity against E. coli RNase H, but great selectivity over human Rnase H, with IC50s value of 2.0 μM, 2.5 μM, 100 μM, 10.6 μM, respectively[1].
References:
[1]. Michaela Wendeler, et al. Vinylogous Ureas as a Novel Class of Inhibitors of Reverse Transcriptase-Associated Ribonuclease H Activity. ACS Chem Biol. 2008 Oct 17;3(10):635-44.