(2S)-1-[(4S)-2,2-dimethyl[1,3]dioxolan-4-yl]pent-4-en-2-ol

tert-butyl (S)-1-((S)-2,2-dimethyl-1,3-dioxolan-4-yl)pent-4-en-2-yl carbonate

tert-butyl (4S,6S)-6,7-dihydroxyhept-1-en-4-yl carbonate

(4S,6S)-7-(benzyloxy)-6-hydroxyhept-1-en-4-yl tert-butyl carbonate