There is disclosed {HEAD ~ a novel 4,8 dimethylbicyclononane derivative} represented by the formula : ##STR1## wherein X and Y have the same meanings as defined in {TAIL ~ the specification} 
There is disclosed { HEAD ~ a novel 4,8 dimethylbicyclononane derivative } represented by the formula : # # STR1 # # wherein X and Y have the same meanings as defined in { TAIL ~ the specification }
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