CDK12-IN-4, a pyrazolotriazine compound, exhibits potent inhibition of CDK12 by achieving an IC50 value of 0.641 μM, utilizing high ATP levels (2 mM). Notably, CDK12-IN-4 does not impact CDK2 Cyclin E (IC50 > 20 μM) or CDK9 Cyclin T1 (IC50 > 20 μM) under the influence of high ATP (2 mM) levels (WO2021116178A1).
CDK12-IN-6, a pyrazolotriazine compound, is a powerful inhibitor of CDK12. Its inhibitory activity is significant with an IC50 value of 1.19 μM when tested at high ATP concentration (2 mM). Notably, CDK12-IN-6 does not exhibit any inhibitory effect on CDK2 Cyclin E (IC50 >20 μM) and CDK9 Cyclin T1 (IC50 >20 μM) when tested under the same high ATP conditions (2 mM) (WO2021116178A1).
UK122 is a highly effective and specific inhibitor of urokinase-type plasminogen activator (uPA) with an IC50 value of 0.2 μM. It displays negligible to minimal inhibition towards tissue-type plasminogen activator (tPA), plasmin, thrombin, and trypsin (all IC50 >100 μM). Functioning as a 4-oxazolidinone analogue, UK122 is an anticancer agent that effectively inhibits cancer cell migration and invasion.