2-Propenyl (2E,4S,5S,6S,8R,10E,12E)-13-<(2S,3R)-3-Ethyl-2-<2-(trimethylsilyl)ethoxymethoxymethyl>-1,4-dioxaspiro<4.4>nonan-2-yl>-4,6,8-trimethyl-9-oxo-5-<2-(trimethylsilyl)ethoxymethoxy>-2,10,12-tridecatrienoate

(3R,5S,6R)-Tetrahydro-3,5-dimethyl-6-<(1R)-1-methyl-2-propenyl>-2H-pyran-2-on