4-{4-(tert-butyl-dimethyl-silanyloxy)-6-[2-(tert-butyl-dimethyl-silanyloxy)-3-methoxy-propyl]-2-methoxy-3,5-dimethyl-tetrahydro-pyran-2-yl}-5-[3-(tert-butyl-dimethyl-silanyloxy)-2-methoxy-7-methyl-nona-6,8-dienyl]-[1,3]dioxolan-2-one