4-Thiazolecarboxamide, 2-[[4-(aminosulfonyl)benzoyl]amino]-N-cyclopentyl-

hCAI/II-IN-3 (compound 5b) is a potent dual hCA I/II inhibitor with Ki values of 51.25, 13.15 and 42.18 nM for hCA I, hCA II and hCA Ⅸ. hCAI/II-IN-3 possesses anti-hypoxic activity against acute mountain sickness (AMS) and low cellular activity[1].

[1] Yang C, et al. N-Quinary heterocycle-4-sulphamoylbenzamides exert anti-hypoxic effects as dual inhibitors of carbonic anhydrases I/II. Bioorg Chem. 2020 Jul;100:103931. DOI:10.1016/j.bioorg.2020.103931