cis-(±)-2-oxabicyclo[3.3.0]oct-6-en-3-one
Biphenyl-4-carboxylic acid (3aS,4R,5S,6aR)-2-oxo-4-trityloxymethyl-hexahydro-cyclopenta[b]furan-5-yl ester
(+/-)-7α-hydroxy-2-oxa-6β-triphenylmethoxymethyl-cis-bicyclo[3.3.0]octan-3-one
7α-formyloxy-8β-formyloxymethylene-cis-2-oxabicyclo<3.3.0>octan-3-one
(+/-)-(3aα,4α,5β,6aα)-5-hydroxy-4-(hydroxymethyl)hexahydro-2H-cyclopentafuran-2-one
<3aS(3aα,4α,5β,6aα)>-(+)-5-(1,1'-biphenyl-4-carbonyloxy)hexahydro-4-hydroxymethyl-2H-cyclopentafuran-2-one
(1S,2R,3S,4R)-3-(tert-Butyl-diphenyl-silanyloxymethyl)-2-(2-[1,3]dithian-2-ylidene-ethyl)-4-(tetrahydro-pyran-2-yloxy)-cyclopentanol
(1SR,5RS,6SR,7RS)-(+/-)-7'-<(1,1-dimethylethyl)diphenylsilyloxymethyl>-8'-(tetrahydro-2H-pyran-2-yloxy)spiro<1,3-dithian-2,3'-<2>oxabicyclo<4.3.0>nonane>
(1SR,5RS,6SR,7RS)-(+/-)-6-<(1,1-dimethylethyl)diphenylsilyloxymethyl>-7-hydroxy-2-oxabicyclo<3.3.0>octane-3-one
(1SR,5RS,6SR,7RS)-(+/-)-7-<(4-biphenyl)carbonyloxy>-6-<(1,1-dimethylethyl)diphenylsilyloxy>methyl-2-oxabicyclo<3.3.0>octane-3-one