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. 2020 Mar 13;8:e8649. doi: 10.7717/peerj.8649

Table 1. Inhibition data of CDK8/CycC for compounds 5a-i, using Staurosporine as a standard inhibitor.

Comp. R R‘ % enzyme inhibition ± SD(20 µM) IC50(µM)
5a 6-Br SO2NH2 83.91 ± 1.83 3.98
5b 6-OCH3 SO2NH2 63.365 ± 2.31 5.34
5c 7-Cl-6-F SO2NH2 37.925 ± 1.31 No inhibition
5d 6-Br NHSO2CH3 88.59 ± 0.97 0.639
5e 6-OCH3 NHSO2CH3 85.875 ± 0.94 1.42
5f 7-Cl-6-F NHSO2CH3 27.225 ± 8.46 No inhibition
5g 6-Br SO2NHCH3 22.425 ± 1.02 No inhibition
5h 6-OCH3 SO2NHCH3 18.655 ± 0.48 No inhibition
5i 7-Cl-6-F SO2NHCH3 31.96 ± 0.82 No inhibition
Staurosporine 1.00 E–4