名称:
                                Long-acting contraceptive agents: Cyclopropyl and cyclobutyl esters of norethisterone
                             
                            
                                摘要:
                                Several esters of norethisterone (17 alpha-ethynyl-17 beta-hydroxyestr-4-en-3-one) with carboxylic acids containing a cyclopropyl or cyclobutyl ring have been synthesized and the stereochemistries of the side-chains determined.
                             
                                                            
                                    DOI:
                                    10.1016/0039-128x(83)90100-9