((2S,3R)-2-Benzyloxymethyl-5-ethoxy-tetrahydro-furan-3-yl)-acetic acid methyl ester

((2S,3R)-2-Benzyloxymethyl-5-ethoxy-tetrahydro-furan-3-yl)-thioacetic acid O-methyl ester

[(S)-2-(2-Bromo-1-ethoxy-ethoxy)-but-3-ynyloxymethyl]-benzene

(S)-5-Benzyloxy-4-(2-bromo-1-ethoxy-ethoxy)-pent-2-ynoic acid methyl ester

(Z)-5-Benzyloxy-4-(2-bromo-1-ethoxy-ethoxy)-pent-2-enoic acid methyl ester