acid hydrolysis in a two phase system. It seems probable that the double bonds are B, r to the carbonyl groups since the ultraviolet absorption spectrum fails to show the strong maximum at 2200-2500 A. characteristic of a, B-unsaturated ketones. 8 Hydrogenation of XVIII over platinum oxide activated with ferrous chloride affords a 43% yield of a non-ketonic substance with the properties expected for structure XIX. The enol ethers XVI and XVII in ...