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

(3aR,4aS,5R,7aR,7bR)-7a-(tert-Butyl-dimethyl-silanyloxymethyl)-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

(S)-2-(tert-Butyl-diphenyl-silanyloxy)-1-{(3aR,5S,6R,6aR)-6-[2-(tert-butyl-diphenyl-silanyloxy)-ethyl]-2,2-dimethyl-6-vinyl-tetrahydro-furo[2,3-d][1,3]dioxol-5-yl}-ethanol