ethyl (E,4S,5S)-5,6-dihydroxy-5,6-O-isopropylidene-4-methoxymethoxy-2-hexenoate

ethyl (5R)-5,6-dihydroxy-5,6-O-isopropylidene-hexanoate

ethyl (4S,5S)-5,6-dihydroxy-5,6-O-isopropylidene-4-methoxymethoxy-hexanoate

Toluene-4-sulfonic acid 4-((R)-2,2-dimethyl-[1,3]dioxolan-4-yl)-butyl ester