(4S,5S)-4,5-bis-1-[(S)-allyloxy-3-methylbut-3-enyl]-2,2-dimethyl-[1,3]-dioxolane

1-{(2R)-2-methyl-3-[(2R,6R)-6-(2-triethylsilanyloxy-ethyl)-3,6-dihydro-2H-pyran-2-yl]propyl}vinyl triofluoromethanesulfonate

(S)-4-methyl-1-trityloxymethyl-3,6-dihydro-2H-pyran

(S)-3,6-dihydro-4-methyl-2H-pyran-2-carbaldehyde

(2S)-2-(4-methoxybenzyloxy)-4-methyl-3,6-dihydro-2H-pyran