1-[(7R,8S,9S)-9-((S)-2-Benzenesulfinyl-1-methyl-ethyl)-8-methyl-6,10-dioxa-spiro[4.5]dec-7-yl]-ethanone

1-{(4S,5S,6R)-6-[(S)-2-(tert-Butyl-diphenyl-silanyloxy)-1-methyl-ethyl]-2,2,5-trimethyl-[1,3]dioxan-4-yl}-ethanone