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

Toluene-4-sulfonic acid 2-((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)-ethyl ester

((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)-acetic acid ethyl ester

((2R,3S,3aS,4aS,7S,8aR,9S,9aS)-3,9-Dihydroxy-2-trityloxymethyl-decahydro-furo[3,2-b]pyrano[2,3-e]pyran-7-yl)-acetic acid methyl ester

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