title: Steroids. XVII. Functionalisation of the 5 beta-methyl group in 9,10-epoxy-5-methyl-19-nor 5 beta-steroids and 5-methyl-18,19-bisnor-delta 13(17)-5 beta, 8 alpha, 9 beta, 10 alpha, 14 beta-steroids.
mesh_terms: D002776:Cholestanes / Q000138:chemical synthesis*; D004988:Ethers, Cyclic / Q000138:chemical synthesis; D009654:Norsteroids / Q000138:chemical synthesis*
chemical_list: D002776:Cholestanes; D004988:Ethers, Cyclic; D009654:Norsteroids