87480-42-0;83830-72-2;50415-43-5;1,4:5,8:9,10-Trimethanoanthracene, 1,4,4a,5,8,8a,9,9a,10,10a-decahydro-(1alpha,4alpha,4aalpha,5alpha,8alpha,8aalpha,9beta,9aalpha,10beta,10aalpha)-;1,4:5,8:9,10-Trimethanoanthracene, 1,4,4a,5,8,8a,9,9a,10,10a-decahydro-(1.alpha.,4.alpha.,4a.alpha.,5.beta.,8.beta.,8a.alpha.,9.beta.,9a.alpha.,10.beta.,10a.alpha.)-;1,4:5,8:9,10-Trimethanoanthracene, 1,4,4a,5,8,8a,9,9a,10,10a-decahydro-(1.alpha.,4.alpha.,4a.alpha.,5.alpha.,8.alpha.,8a.alpha.,9.alpha.,9a.beta.,10.alpha.,10a.beta.)-;1,4:5,8:9,10-Trimethanoanthracene, 1,4,4a,5,8,8a,9,9a,10,10a-decahydro-(1alpha,4alpha,4aalpha,5alpha,8alpha,8aalpha,9alpha,9abeta,10alpha,10abeta)-;1,4:5,8:9,10-Trimethanoanthracene, 1,4,4a,5,8,8a,9,9a,10,10a-decahydro-(1alpha,4alpha,4aalpha,5beta,8beta,8aalpha,9beta,9aalpha,10beta,10aalpha)-;1,4:5,8:9,10-Trimethanoanthracene, 1,4,4a,5,8,8a,9,9a,10,10a-decahydro-(1.alpha.,4.alpha.,4a.alpha.,5.alpha.,8.alpha.,8a.alpha.,9.beta.,9a.alpha.,10.beta.,10a.alpha.)-