methyl 2-[(9-phenylfluoren-9-yl)amino]-2-deoxy-3,4:5,6-di-O-isopropylidene-D-mannonate

2-(1',2'-O-isopropylidene-1',2'-dihydroxy-3',4'-diacetoxybutyl)-3-hydroxy-N-(9-phenylfluoren-9-yl)pyrrolidine

2-(1',2'-O-isopropylidene-1',2'-dihydroxy-3',4'-diacetoxybutyl)-3-oxo-N-(9-phenylfluoren-9-yl)pyrrolidine

2-(1',2'-O-isopropylidene-4'-O-tosyl-1',2',3',4'-tetrahydroxybutyl)-3-hydroxy-N-(9-phenylfluoren-9-yl)pyrrolidine

(1'R,2'S,3'S,3S)-2-(3',4'-anhydro-1',2'-O-isopropylidene-1',2'-dihydroxybutyl)-3-hydroxy-N-(benzyloxycarbonyl)-pyrrolidine