title: Long-acting contraceptive agents: carbonates and carbamates of norethisterone.
abstract: The preparation of three carbonates and two carbamates of norethisterone (17 alpha-ethynyl-17 beta-hydroxyestr-4-en-3-one) are described. Due to instability of the carbonates and the very low solubility of the carbamates these compounds could not be submitted to biological testing.
mesh_terms: D002219:Carbamates; D002254:Carbonates; D003692:Delayed-Action Preparations; D007202:Indicators and Reagents; D009682:Magnetic Resonance Spectroscopy; D009640:Norethindrone / Q000031:analogs & derivatives* / Q000138:chemical synthesis; D013053:Spectrophotometry; D013329:Structure-Activity Relationship
chemical_list: D002219:Carbamates; D002254:Carbonates; D003692:Delayed-Action Preparations; D007202:Indicators and Reagents; D009640:Norethindrone