(1S,3R,4R,5S,6S)-3-[(R)-2-(tert-Butyl-dimethyl-silanyloxy)-1-methyl-ethyl]-6-(2-methoxy-ethoxymethoxy)-1,4-dimethyl-2,9-dioxa-bicyclo[3.3.1]nonan-8-one

(S)-2-((1S,3S,4R,5S)-1,4,8-Trimethyl-6-oxo-2,9-dioxa-bicyclo[3.3.1]non-7-en-3-yl)-propionaldehyde