“…Working solutions of testosterone (0.1, 0.2, 0.5, 1, 5, 10, 20 μM) were prepared from a 50 μM stock solution in methanol. Working solutions of inhibitors, prohibited drugs, and natural flavonoids, were prepared at different concentration, according to their IC25 , IC 50 , and IC 75 (formestane, anastrozole, and aminoglutethimide 0.4, 0.8, 1.2 μM; daidzein 1, 5, 10 μM; chrysin 0.35, 0.7, 1 μM; quercetin 25, 50, General structure of A, flavonoids and B, isoflavones and of C, methoxyisoflvone and D, ipriflavone 100 μM), in methanol. 29-31 Stock solution of methoxyisoflavone and ipriflavone (5, 10, 50 μM) were prepared in methanol.…”