4-(tert-butyl-dimethyl-silanyloxy)-3,5-dimethyl-6-[2,6,12-tris-(tert-butyl-dimethyl-silanyloxy)-14-(4-methoxy-benzyloxy)-5,7,11,13,15-pentamethyl-nonadeca-3,8,16,18-tetraenyl]-tetrahydro-pyran-2-one