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process for the manufacture of 16 - fluormethylen - 17 amp; alpha; - hydroxy - 20 - keto steroids of pregnan -, 19 - nor pregnan or iso pregnanrækken or 17 amp; alpha; - esters.
process for the manufacture of 16 - fluormethylen - 17 amp; alpha; - hydroxy - 20 - keto steroids of pregnan -, 19 - nor pregnan or iso pregnanrækken or 17 amp; alpha; - esters.