Ruzicka Butenandt
Butenandt and G. Hanisch published a paper describing “A Method for Preparing Testosterone from Cholesterol.”
Ruzicka and A. Wettstein, announced a patent application in a paper “On the Artificial Preparation of the Testicular Hormone Testosterone.”
Their independent partial syntheses of testosterone from a cholesterol base earned Butenandt and Ruzicka each a share of the 1939 Nobel Prize for Chemistry.