(5S,1'S)-5-(2'-bromo-1'-hydroxy)ethyl-4,5-dihydro-2-(3H)-furanone

1-deoxy-5-thio-D-mannopyrano-3,6-lactone

6-O-t-butyldimethylsilyl-3,4-O-isopropylidene-1-deoxymannojirimycin