title: Assignment by 13-C-NMR spectroscopy of configuration at C-5 in 17 alpha-ethylestran-17 beta-ol, an impurity in the anabolic steroid ethylestrenol.
abstract: The stereochemistry at C-5 in 17 alpha-ethylestran-17 beta-ol, found as an impurity in ethylesterenol, was assigned by 13C-NMR spectroscopy. The hydrogen atom attached to C-5 is in the alpha-configuration. Resonance assignments were confirmed by partial deuteration, off-resonance 13C-(1H)-decoupling, and comparison with model compounds.
mesh_terms: D002247:Carbon Isotopes; D002849:Chromatography, Gas; D004340:Drug Contamination; D005032:Ethylestrenol / Q000031:analogs & derivatives* / Q000032:analysis / Q000138:chemical synthesis; D009682:Magnetic Resonance Spectroscopy; D008968:Molecular Conformation
chemical_list: D002247:Carbon Isotopes; C017301:17 alpha-ethylestran-17 beta-ol; D005032:Ethylestrenol