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

(S)-2-allyloxy-4-methyl-1-trityloxy-4-pentene

(1S)-1-{(4R,5R)-5-[(1S)-1-hydroxy-3-methyl-3-butenyl]-2,2-dimethyl-1,3-dioxolan-4-yl}-3-methyl-3-buten-1-ol

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

(1S,2S)-1,2-bis-[4-methyl-3,6-dihydro-2H-pyran-(2S)-yl]-ethane-1,2-diol