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process for the production of 20 cycloketalderivaten of 3 amp; beta;, 5.17 amp; alpha; - trihydroxy - 6 amp; beta; - methyl - 16 - methylene 5 amp; alpha; - pregnan - 20 - ons
process for the production of 20 cycloketalderivaten of 3 amp; beta;, 5.17 amp; alpha; - trihydroxy - 6 amp; beta; - methyl - 16 - methylene 5 amp; alpha; - pregnan - 20 - ons
