Toluene-4-sulfonic acid (R)-2-hydroxy-2-[(2S,5R)-2-methyl-5-((S)-4-methyl-2-oxo-[1,3]dioxolan-4-yl)-tetrahydro-furan-2-yl]-ethyl ester

(S)-4-{(2R,5S)-5-[(R)-1-(tert-Butyl-diphenyl-silanyloxy)-ethyl]-5-methyl-tetrahydro-furan-2-yl}-4-methyl-[1,3]dioxolan-2-one

Toluene-4-sulfonic acid (S)-2-{(2R,5S)-5-[(R)-1-(tert-butyl-diphenyl-silanyloxy)-ethyl]-5-methyl-tetrahydro-furan-2-yl}-2-hydroxy-propyl ester