methyl (1S*,5S*,7R*,8R*)-7-tert-butyldimethylsilyloxy-3-methoxycarbonyl-8-(3-tert-butyldimethylsilyloxy-E-1-octenyl)-2-oxobicyclo<3.3.0>octane-3-pentanoate

(1RS,2SR,5RS,7SR,8SR)-7-t-butyldimethylsilyloxy-3,3,8-trimethylbicyclo<3.3.0>octan-2-ol