(E)-7-(tert-Butyl-diphenyl-silanyloxy)-2-methyl-hept-2-enal

{(2R,6R)-6-[(E)-6-(tert-Butyl-diphenyl-silanyloxy)-1-methyl-hex-1-enyl]-2-methoxy-5-methyl-3,6-dihydro-2H-pyran-2-yl}-acetic acid methyl ester

{(2R,4R,5R,6S)-6-[(E)-6-(tert-Butyl-diphenyl-silanyloxy)-1-methyl-hex-1-enyl]-4-hydroxy-2-methoxy-5-methyl-tetrahydro-pyran-2-yl}-acetic acid methyl ester