NTPDase-IN-1 (compound 5a) is a selective inhibitor of NTPDase enzymes. It shows inhibitory activity against h-NTPDase-1, h-NTPDase-2, and h-NTPDase-8 with IC50 values of 0.05 μM, 0.23 μM, and 0.54 μM, respectively. NTPDase-IN-1 exerts non-competitive inhibition on h-NTPDase-1 and h-NTPDase-2, with a K m value of 21 μM for h-NTPDase-1. This compound is useful for investigating various conditions like cancer, immunologic disorders, and bacterial infections [1].
ARL 67156 is a weak competitive inhibitor of NTPDase1 (CD39), NTPDase3 and NPP1, with Kis of 11, 18 and 12 μM, respectively[1]. ARL67156 trisodium salt is an inhibitor of ecto-ATPase.