(R,E)-(3-(2-(tert-butyldimethylsilyl)vinyl)-4-methylenecyclopentane-1,1-diyl)dimethanol

dimethyl (4R)-4-((E)-2-(tert-butyldimethylsilyl)vinyl)-3-hydroxy-3-(hydroxymethyl)cyclopentane-1,1-dicarboxylate

dimethyl (4R)-3-hydroxy-3-(hydroxymethyl)-4-vinylcyclopentane-1,1-dicarboxylate

dimethyl (4S)-4-ethyl-3-hydroxy-3-(hydroxymethyl)cyclopentane-1,1-dicarboxylate

diethyl (4S)-4-ethyl-3-hydroxy-3-(hydroxymethyl)cyclopentane-1,1-dicarboxylate