(2E,6E)-(S)-5-(2-Methoxy-ethoxymethoxy)-8-oxo-octa-2,6-dienoic acid ethyl ester

(E)-(S)-5-(2-Methoxy-ethoxymethoxy)-6-trityloxy-hex-2-enoic acid ethyl ester

(2E,6E,8Z)-(S)-10-[1,3]Dithian-2-yl-5-(2-methoxy-ethoxymethoxy)-deca-2,6,8-trienoic acid ethyl ester

(E)-ethyl 4-((S)-2,2-dimethyl-1,3-dioxolan-4-yl)but-2-enoate

(E)-(S)-6-Hydroxy-5-(2-methoxy-ethoxymethoxy)-hex-2-enoic acid ethyl ester