| 摘要 |
1-Oxa-13 beta -R1-17 alpha -methyl-A-nor- DELTA 3(5),9-gonadienes of the formula WHEREIN R1 is alkyl of one to three carbon atoms and R2 is acyl of an aliphatic carboxylic acid of two to four carbon atoms having antiandrogenic activity and their preparation and intermediates formed therein.
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