2-methyl-but-2-enoic acid 7-(tert-butyl-dimethyl-silanyloxy)-2-(4-methoxy-phenyl)-6-[2,2,4-trimethyl-6-(1-propyl-but-3-enyloxy)-tetrahydro-[1,3]dioxolo[4,5-c]pyran-7-yloxy]-hexahydro-pyrano[3,2-d][1,3]dioxin-8-yl ester

5-acetoxy-4-oxo-non-8-enoic acid 2-trimethylsilanyl-ethyl ester

6-but-3-enyl-pyran-2,5-dione