(3E,11E,13E)-(5S,6S,7S,9R,15S,16R)-6-(tert-Butyl-dimethyl-silanyloxy)-16-ethyl-5,7,9,15-tetramethyl-oxacyclohexadeca-3,11,13-triene-2,10-dione

(E)-(4S,5R)-4-Methyl-5-(tetrahydro-pyran-2-yloxy)-hept-2-enoic acid methyl ester