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

Acetic acid (4R,5S)-5-benzyloxymethyl-4-methoxythiocarbonylmethyl-tetrahydro-furan-2-yl ester

[(2S,3R,5R)-2-Hydroxymethyl-5-(5-methyl-2,4-dioxo-3,4-dihydro-2H-pyrimidin-1-yl)-tetrahydro-furan-3-yl]-acetic acid methyl ester

[(2S,3R,5S)-2-Hydroxymethyl-5-(5-methyl-2,4-dioxo-3,4-dihydro-2H-pyrimidin-1-yl)-tetrahydro-furan-3-yl]-acetic acid methyl ester