1-((3R,5S,8R,9S,10S,13S,14S,17S)-3-Hydroxy-10,13-dimethylhexadecahydro-1H-cyclopenta[a]phenanthren-17-yl)ethanone
A pregnane found in the urine of pregnant women and sows. It has anesthetic, hypnotic, and sedative properties.