Prochloraz-d7 (BTS 40542-d7) is the deuterium labeled Prochloraz (HY-B0845). Prochloraz is an imidazole antifungal. Prochloraz is as an estrogen receptor (ER) and androgen receptor (AR) antagonist and an aromatase inhibitor with IC50 values of 25 µM, 4 µM and 0.3 µM, respectively. Prochloraz is able to activate the aryl hydrocarbon receptor (AhR) having an EC50 of 1 µM[1][2].