3-keto-23,24-bisnorchol-4-en-22-ol;(20S)-21-Hydroxy-20-Methylpregn-4-en-3-one;23,24-Bisnorchol-4-en-3-on-22-ol;Progesterone Impurity 38;(20S)-21-HYDROXY-20-METHYLPREGN-4-EN-3-ONE(STIGMASTEROL RELATED COMPOUND);Pregn-4-en-3-one, 21-hydroxy-20-methyl-, (20S)-;Stigmasterol Related Compound 1 ((20S)-21-Hydroxy-20-Methylpregn-4-en-3-one);Stigmasterol Related Compound ((20S)-21-Hydroxy-20-Methylpregn-4-en-3-one)
(20S)-21-Hydroxy-20-methylpregn-4-en-3-one is a side chain degradation product of natural sterols. It is also an intermediate in the preparation of follicular fluid-meiosis activating sterol.