4-{((E)-1S,5S,6S,7R)-7-(Tetrahydropyran-2-yloxy)-6-tert-butyldiphenylsilyloxymethyl-bicyclo[3.3.0]oct-3-ylidene}-butanoic acid 、 5-{(E)-(1S,5S,6S,7R)-7-(Tetrahydropyran-2-yloxy)-6-tert-butyldiphenylsilyloxymethyl-bicyclo[3.3.0]oct-3-ylidene}-pentanoic acid 生成
4-{((Z)-1S,5S,6S,7R)-7-(Tetrahydropyran-2-yloxy)-6-tert-butyldiphenylsilyloxymethyl-bicyclo[3.3.0]oct-3-ylidene}-butanoic acid methyl ester