title: [6-Methyl-19-nor-pregnenes. I. Splitting of the tetrahydrofuranic ring in 6 alpha-methyl-6 beta, 19-oxides].
mesh_terms: D000475:Alkenes / Q000138:chemical synthesis; D007202:Indicators and Reagents; D009650:Norpregnanes / Q000138:chemical synthesis*; D010087:Oxides / Q000138:chemical synthesis*; D011277:Pregnanediones / Q000138:chemical synthesis; D011283:Pregnenes / Q000138:chemical synthesis*; D011284:Pregnenolone / Q000031:analogs & derivatives / Q000138:chemical synthesis; D011374:Progesterone / Q000031:analogs & derivatives / Q000138:chemical synthesis; D013150:Spirostans / Q000138:chemical synthesis
chemical_list: D000475:Alkenes; D007202:Indicators and Reagents; D009650:Norpregnanes; D010087:Oxides; D011277:Pregnanediones; D011283:Pregnenes; D013150:Spirostans; D011374:Progesterone; D011284:Pregnenolone
vernacular_title: 6-Methil-19-nor-pregneni. nota I - La scissione dell'anello tetraidrofuranico nei 6alpha-metil-6beta,19-ossidi