107316-48-3 1434-54-4 25875-43-8 3beta-Hydroxy-20-oxo-5-pregnene-16alpha-carbonitrile PREGNENOLONE CARBONITRILE Pregn-5-ene-16-carbonitrile, 3-hydroxy-20-oxo-, (3beta,16alpha)- Pregnenolone 16alpha-carbonitrile Pregnenolone-16alpha-carbonitrile