title: Long-acting contraceptive agents: furylalkylcarboxylic acid esters of norethisterone.
abstract: 5-Methyl- and 5-ethyl-furylalkylcarboxylic esters of norethisterone (17 alpha-ethynyl-17 beta-hydroxyestr-4-en-3-one) were prepared in high yield in the presence of thallous ethoxide. The activities of these compounds as long-acting contraceptive agents have been evaluated.
mesh_terms: D002264:Carboxylic Acids; D003692:Delayed-Action Preparations; D004952:Esters; D007202:Indicators and Reagents; D009682:Magnetic Resonance Spectroscopy; D013058:Mass Spectrometry; D009640:Norethindrone / Q000031:analogs & derivatives* / Q000138:chemical synthesis; D013053:Spectrophotometry; D013329:Structure-Activity Relationship
chemical_list: D002264:Carboxylic Acids; D003692:Delayed-Action Preparations; D004952:Esters; D007202:Indicators and Reagents; D009640:Norethindrone