2,2-Dimethyl-propionic acid (4S,5S)-5-[(2R,3R,4R,5R)-3-hydroxy-5-(2-hydroxy-ethyl)-4-methoxymethoxy-tetrahydro-furan-2-yl]-2,2-dimethyl-[1,3]dioxolan-4-ylmethyl ester

(E)-5-((3aS,4S,5aR,5bS,9aR,10aR,10bR)-2,2,7,7-Tetramethyl-octahydro-1,3,5,6,8,10-hexaoxa-cyclopenta[a]fluoren-4-yl)-pent-2-enoic acid methyl ester

2,2-Dimethyl-propionic acid (4S,5S)-5-((2R,3S,4S,5R)-3-benzyloxy-4-hydroxy-5-hydroxymethyl-tetrahydro-furan-2-yl)-2,2-dimethyl-[1,3]dioxolan-4-ylmethyl ester

2,2-Dimethyl-propionic acid (4S,5S)-5-((4aR,6S,7R,7aS)-2,2-dimethyl-7-triethylsilanyloxy-tetrahydro-furo[3,2-d][1,3]dioxin-6-yl)-2,2-dimethyl-[1,3]dioxolan-4-ylmethyl ester

2,2-Dimethyl-propionic acid (4S,5S)-5-{(2R,3R,4R,5R)-5-[2-(tert-butyl-dimethyl-silanyloxy)-ethyl]-3-hydroxy-4-methoxymethoxy-tetrahydro-furan-2-yl}-2,2-dimethyl-[1,3]dioxolan-4-ylmethyl ester