Carbonic anhydrase inhibitor 4 is a photoprobe that inhibits the activity of carbonic anhydrase. It specifically targets human carbonic anhydrases, including hCA I-XIV, with K i values ranging from 640-1166 nM [1].
Carbonic anhydrase inhibitor 14 (Compound 8b) is a potent CA inhibitor, exhibiting K i values of 1203, 99.7, 9.4, and 27.7 nM against hCA I, hCA II, hCA IX, and hCA XII, respectively. Additionally, it effectively inhibits CDK2 with an IC 50 of 20.3 μM. Furthermore, Carbonic anhydrase inhibitor 14 demonstrates significant antitumor activity [1].