Danazol has also been found to be a weak inhibitor of steroid sulfatase (Ki = 2.3–8.2 μM), the enzyme that converts DHEA-S to DHEA and estrone sulfate to estrone (which can then subsequently be transformed into estrone (with androstenedione as an intermediate) and estradiol, respectively).[22] Although in contradiction with the above data, another study found that danazol weakly inhibited aromatase as well, with 44% inhibition at a concentration of 10 μM.[22]