The two main hydroperoxides from the auto-oxidation of lanostenyl acetate in ethyl acetate at 50" after 14 days, are the 7P-hydroperoxy- and the 11 p-hydroperoxy-derivatives. Six minor peroxides are also present. ... COMMERCIAL wool wax contains many unidentified sub- stances derived by auto-oxidation of cholesterol and iso- cholesterol. The structures of the main early products from the auto-oxidation of cholesterol have been elucidated, principally by Bergstrom and ...