Synonyms: Spiro[cyclopenta[a]cyclopropa[2,3]cyclopenta[1,2-f]naphthalene-9(10H),1'-cyclopropane],spiro[3,5-cycloandrostane-7,1'-cyclopropane] deriv.;Spiro[cyclopenta[a]cyclopropa[2,3]cyclopenta[1,2-f]naphthalene-9(10H),1'-cyclopropane],tetradecahydro-3a,5a-dimethyl-, [3aR-(3aa,3bb,5aa,8ab,8ba)]-; [3aR-(3aa,3bb,5aa,8ab,8ba)]-Tetradecahydro-3a,5a-dimethylspiro[cyclopenta[a]cyclopropa[2,3]cyclopenta[1,2-f]naphthalene-9(10H),1'-cyclopropane]