(1S,2S,3S,4R,4aR,5R,6S,7S,8aR)-2-bromo-3,5-epoxy-6,7-(O-isopropylidenedioxy)perhydro-endo-1,4-methanonaphthalen-8-one

(1R,4S,4aR,5R,6S,7S,8aS)-5-tert-butyldimethylsiloxy-6,7-O-isopropylidenedioxy-1,4,4a,5,6,7,8,8a-octahydro-endo-1,4-methano-naphthalen-8-one