2-(1-Bromomethyl-vinyl)-2,5,5-trimethyl-[1,3]dioxane

(1R,3S,4S,5R)-3-((S)-2-Benzyloxy-1-methyl-ethyl)-1,4-dimethyl-8-methylene-2,9-dioxa-bicyclo[3.3.1]nonan-6-ol

(1S,3S,4S,5S,6R)-3-((R)-2-Benzyloxy-1-methyl-ethyl)-1,4-dimethyl-8-methylene-2,9-dioxa-bicyclo[4.2.1]nonan-5-ol