1D-(1,2,3,4/5)-4-O-[(tert-butyl)dimethylsilyl]-2,3-O-isopropylidene-5-O-(methylsulfonyl)-1-O-[(trifluoromethyl)sulfonyl]cyclopentane-1,2,3,4,5-pentol

(+)-tetraacetylmannostatin A

1D-(1,2,3/4,5)-1,2-O-isopropylidene-5-(methylsulfanyl)-4-O-(methylsulfonyl)cyclopentane-1,2,3,4-tetrol

4-amino-3,5-dihydroxycyclopentene

4-acetamido-3,5-diacetoxycyclopentene