YKL-5-124 TFA is a potent, selective, irreversible and covalent inhibitor of CDK7 (IC50s of 53.5 nM and 9.7 nM for CDK7 and CDK7 Mat1 CycH, respectively).
CDK7-IN-1 is an analog derived from YKL-5-124 and functions as an inhibitor of cyclin-dependent kinase 7 (cdk7). It exhibits strong inhibitory activity, with an IC50 value of less than 100 nM (WO 2016105528 A2, Compound 215).