(S)-2-[(3aR,5S,6R,6aR)-6-(tert-Butyl-dimethyl-silanyloxymethyl)-6-(2-hydroxy-ethyl)-2,2-dimethyl-tetrahydro-furo[2,3-d][1,3]dioxol-5-yl]-2-methoxy-ethanol

(3R,3aS,6R,6aS)-3a-Acetoxymethyl-5-(2,2-dimethyl-propionyloxy)-2,3-dihydroxy-6-methoxy-3,3a,6,6a-tetrahydro-2H-cyclopenta[b]furan-4-carboxylic acid methyl ester

2,2-Dimethyl-propionic acid 2-{(3aR,5S,6R,6aR)-5-[(S)-2-(2,2-dimethyl-propionyloxy)-1-methoxy-ethyl]-6-hydroxymethyl-2,2-dimethyl-tetrahydro-furo[2,3-d][1,3]dioxol-6-yl}-ethyl ester

(R)-[(3aR,5S,6R,6aR)-6-(tert-Butyl-dimethyl-silanyloxymethyl)-6-methoxycarbonylmethyl-2,2-dimethyl-tetrahydro-furo[2,3-d][1,3]dioxol-5-yl]-methoxy-acetic acid methyl ester

(3aR,4aS,5R,7aR,7bR)-7a-Acetoxymethyl-6-(2,2-dimethyl-propionyloxy)-5-methoxy-2,2-dimethyl-4a,5,7a,7b-tetrahydro-3aH-cyclopenta[4,5]furo[2,3-d][1,3]dioxole-7-carboxylic acid methyl ester