CYP24A1 and neoplasm: Sulfocoumarins 13–22, 27–31, 38–47 were screened in vitro for the inhibition of four physiologically relevant hCA isoforms, the cytosolic hCAI and II and the trans-membrane tumor-associated hCA IX and XII [4,5,6,8,40,41,42,43]; acetazolamide (AAZ) was used as standard CAI.