2,2-Dimethyl-propionic acid 2-((4aS,5S,7S,8aR)-7-benzyloxymethyl-2,2,4a-trimethyl-tetrahydro-pyrano[4,3-d][1,3]dioxin-5-yl)-ethyl ester

2,2-Dimethyl-propionic acid 2-[(2S,3R,4R,6S)-6-benzyloxymethyl-4-hydroxy-3-(2-hydroxy-ethyl)-3-methyl-tetrahydro-pyran-2-yl]-ethyl ester

2,2-Dimethyl-propionic acid 2-((4aS,5S,7S,8aR)-7-benzyloxymethyl-2,2,4a-trimethyl-hexahydro-1,6-dioxa-2-sila-naphthalen-5-yl)-ethyl ester

2,2-Dimethyl-propionic acid 2-[(2S,3S,4R,6S)-6-benzyloxymethyl-4-(tert-butyl-dimethyl-silanyloxy)-3-methyl-3-vinyl-tetrahydro-pyran-2-yl]-ethyl ester

2,2-Dimethyl-propionic acid 2-[(2S,3S,4R,6S)-6-benzyloxymethyl-4-(tert-butyl-dimethyl-silanyloxy)-3-(2-hydroxy-ethyl)-3-methyl-tetrahydro-pyran-2-yl]-ethyl ester