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Patent / Jan 01, 2012

Method for the production of fluoromethyl - esters of androstan- 17 - beta - carboxylic acids

  • Emilia Leitao
WO 2012160338

The present invention relates to a method of prepg. an org. biol. active compd. of formula (I), wherein R1, R2, R3, R4,. X1, X2 and X3 are as defined in the specification, to certain novel intermediates obtainable from such a method and their use.