50895-59-5;Tricycloprop[cd,f,hi]indene,decahydro-,(1a.alpha.,1b.alpha.,1c.beta.,2a.beta.,2b.alpha.,2c.alpha.,2d.alpha.,2e.alpha.)-;Tricycloprop(cd,f,hi)indene, decahydro-,(1aalpha,1balpha,1cbeta,2abeta,2balpha,2calpha,2dalpha,2ealpha)-