(3aR,4S,5S,6S,6aS)-5,6-dihydroxy-4-(methylthio)cyclopentoxazolidin-2-one

(3aS,4R,5S,6R,6aS)-4,6-dihydroxy-5-(methylthio)cyclopentoxazolidin-2-one

(3aR,4R,5R,6R,7aS)-6-benzoxy-4,5-dihydroxycyclopentoxazolidin-5-one

(3aR,3bS,6aR,7R,7aR)-7-benzoxy-2,2-dimethyl<1,3>dioxolo<4,5-a>cyclopent<4,5-d>oxazolidin-5-one

(3aR,3bR,6aS,7R,7aS)-7-benzoxy<1,3,2>dioxathiolo<4,5-a>cyclopent<4,5-d>oxazolidin-2,2,5-trione