(E)-(4S,5R)-4-Methyl-5-(tetrahydro-pyran-2-yloxy)-hept-2-enal

(E)-(4S,5S,6S,8R)-5-(tert-Butyl-dimethyl-silanyloxy)-10-(dimethoxy-phosphoryl)-4,6,8-trimethyl-9-oxo-dec-2-enoic acid methyl ester