2,5-anhydro-1-O-tert-butyldiphenylsilyl-5-C-mesyloxymethyl-6-O-mesyl-D-allitol

2,5-anhydro-1-O-tert-butyldiphenylsilyl-3,4-O-isopropylidene-5-C-mesyloxymethyl-6-O-mesyl-D-allitol