(5R,6S)-6-[(3Z,8Z,16Z)-(2S,5S,6S,7S,11S,12R,13R,14S,15S)-2,12-Bis-(tert-butyl-dimethyl-silanyloxy)-14-(4-methoxy-benzyloxy)-6-methoxymethoxy-5,7,9,11,13,15-hexamethyl-nonadeca-3,8,16-trienyl]-5-methyl-tetrahydro-pyran-2-one

(5R,6S)-6-[(3Z,8Z)-(2S,5S,6S,7S,11S,12R,13R,14S,15S)-2,12-Bis-(tert-butyl-dimethyl-silanyloxy)-14-(4-methoxy-benzyloxy)-6-methoxymethoxy-5,7,9,11,13,15-hexamethyl-nonadeca-3,8-dienyl]-5-methyl-tetrahydro-pyran-2-one