Single ring R1 analogs of AT7519. A) CDK14 IC50s
were measured using a LanthaScreen binding assay. IC50s were
calculated as the average of three replicates, and are reported ± the
standard errorB) Antiproliferative activity against the HCT116 cell line was
measured using a CellTiter-Glo assay. IC50s were calculated as the
average of three replicates, and are reported ± the standard error.