Either your web browser doesn't support Javascript or it is currently turned off. In the latter case, please turn on Javascript support in your web browser and reload this page. ... Studies on steroidal compounds. VI. Grignard reaction of 19-nor-4-en-3-oxo-steriods. ... Find all citations by this author (default). ... Find all citations in this journal (default). ... How does Europe PubMed Central derive its citations network?