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methyl (+)-(1S,2R,3R,5R)-3-hydroxy-7,7-ethylenedioxybicyclo[3.3.0]octane-2-carboxylate
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(1S,2R,3R,5R)-2-hydroxymethyl-3-(tetrahydropyran-2-yl)oxy-7,7-ethylenedioxybicyclo[3.3.0]octane
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methyl (+)-(1S,2R,3R,5R)-3-(tetrahydropyran-2-yl)oxy-7,7-ethylenedioxybicyclo[3.3.0]octane-2-carboxylate

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