1L-(1,2,4/3,5)-3,4,5-tri-O-benzyl-1-{[(tert-butyl)diphenylsilyloxy]methyl}-2-(dimethylamino)cyclopentane-3,4,5-triol

ethyl 3,4,5-tri-O-benzyl-7-O-[(tert-butyl)diphenylsilyl]-2,6-dideoxy-2,6-methylene-D-glycero-D-gulo-3,6a-cycloheptonate