(4S,5S)-4-[(1E,5E)-(3R,4R)-3,4-Bis-(tert-butyl-dimethyl-silanyloxy)-hepta-1,5-dienyl]-5-(tert-butyl-dimethyl-silanyloxymethyl)-2,2-dimethyl-[1,3]dioxolane

Toluene-4-sulfonic acid (2S,3S)-2,3-bis-methoxymethoxy-3-[(S)-1-(2-nitro-benzenesulfonyl)-1,2,5,6-tetrahydro-pyridin-2-yl]-propyl ester

(2S)-(1'S,2'S)-3'-hydroxy-[1',2'-(isopropylidenedioxy)propyl]-N-(2-nitrobenzenesulfonyl)-3,4-dehydro-piperidine

(1S,2S,8aS)-1,2-Bis(methoxymethoxy)indolizidine

(1S,2S,8aS)-1,2-bis(methoxymethoxy)-1,2,3,5,6,8a-hexahydro-indolizine