1-{(2E,6E)-(1S,4S,5R)-5-(tert-Butyl-diphenyl-silanyloxy)-1-[(S)-3-(tert-butyl-diphenyl-silanyloxy)-1-methyl-propyl]-2,4,6-trimethyl-octa-2,6-dienyloxymethyl}-4-methoxy-benzene