4-[(1R,5R,6R)-5-(Imidazole-1-carbothioyloxy)-7-oxa-bicyclo[4.1.0]hept-1-yl]-butyric acid methyl ester 、 methyl (1R,3aR,7aR)-3a-hydroxy-1,2,3,4,5,6,7,7a-octahydroindene-1-carboxylate 生成 methyl (1S,3aR,7aR)-3a-hydroxy-1,2,3,4,5,6,7,7a-octahydroindene-1-carboxylate