title: Towards an ecdysone synthesis. 20 -acetoxy-5 -pregna-2,7-dien-6-one.
mesh_terms: D001966:Bromine; D002776:Cholestanes / Q000138:chemical synthesis; D002845:Chromatography; D003525:Cyclosteroids / Q000138:chemical synthesis; D004440:Ecdysone / Q000138:chemical synthesis*; D066298:In Vitro Techniques; D007536:Isomerism; D008094:Lithium; D009682:Magnetic Resonance Spectroscopy; D008722:Methods; D011284:Pregnenolone; D013055:Spectrophotometry, Infrared
chemical_list: D002776:Cholestanes; D003525:Cyclosteroids; D004440:Ecdysone; D011284:Pregnenolone; D008094:Lithium; D001966:Bromine