5α-ANDROSTAN-11β-OL-3, 17-DIONE BISETHYLENEKETAL from Steraloids. For over 6- years, we've supplied the finest research institutions, pharmaceutical companies, and law enforcement agencies with over 2,700 different androgens, estrogens, cholestins, progestins, bileacids, hormones, and metabolites synthesized to purified standards for purposes of research.