[(3S,5S)-6-(tert-Butyl-diphenyl-silanyloxy)-3-methoxy-5-methyl-2-oxo-hexyl]-phosphonic acid dimethyl ester

(E)-(4S,6S)-1-{(2S,3R)-3-[(S)-2-(tert-Butyl-dimethyl-silanyloxy)-1-methyl-ethyl]-2-methyl-oxiranyl}-7-(tert-butyl-diphenyl-silanyloxy)-4-methoxy-6-methyl-hept-1-en-3-one