5, 16-PREGNADIEN-3β, 20α-DIOL DIACETATE ceutical companies, and law enforcement agencies with over 2,700 different androgens, estrogens, cholestins, progestins, bileacids, hormones, and metabolites synthesized to purified standards from Steraloids. For over 60 years, we've supplied the finest research institutions, pharmad standards for purposes of research.