Dimethyl 7-Isopropylidenebicyclo<2.2.1>heptane-exo-2,exo-3-dicarboxylate

(1R,2S,6R,7S)-10-oxotricyclo<5.2.1.02.6>decane-2,6-dicarboxylic anhydride

(1RS,2RS,6SR,7SR)-10-Isopropylidenetricyclo<5.2.1.02,6>decane-2,6-dicarboxylic Anhydride

(1R,2S,6R,7S,10S)-3',3'-dimethylspiro<*>tricyclo-<5.2.1.02.6>decane-10,2'-oxirane<*>-2,6-dicarboxylic anhydride

dimethyl meso-(1R,2S,6R,7S)-10-oxotricyclo<5.2.1.02,6>decane-2,6-dicarboxylate