Synonyms: Cyclopenta[7,8]phenanthro[2,3-b]oxete,4'H-cholest-2-eno[3,2-b]oxete deriv.; Cyclopenta[7,8]phenanthro[2,3-b]oxete,1-(1,5-dimethylhexyl)-1,2,3,3a,3b,4,5,5a,6,8,9,9a,9b,10,11,11a-hexadecahydro-9a,11a-dimethyl-,[1R-[1a(R*),3ab,3ba,9aa,9bb,11aa]]-; [1R-[1a(R*),3ab,3ba,9aa,9bb,11aa]]-1-(1,5-Dimethylhexyl)-1,2,3,3a,3b,4,5,5a,6,8,9,9a,9b,10,11,11a-hexadecahydro-9a,11a-dimethylcyclopenta[7,8]phenanthro[2,3-b]oxete