title: Microbiological transformation of steroids. II. The synthesis of 2 alpha-methyl-19-nortestololactone.
mesh_terms: D000970:Antineoplastic Agents; D001230:Aspergillus / Q000378:metabolism*; D001711:Biotransformation; D004963:Estrenes / Q000378:metabolism*; D005285:Fermentation; D007783:Lactones; D008722:Methods; D009654:Norsteroids / Q000096:biosynthesis*
chemical_list: D000970:Antineoplastic Agents; D004963:Estrenes; D007783:Lactones; D009654:Norsteroids