Synonyms: Spiro[2H-cyclopenta[a]phenanthrene-2,1'-cyclopropane],spiro[cyclopropane-1,2'-estrane] deriv.; Spiro[2H-cyclopenta[a]phenanthrene-2,1'-cyclopropane],hexadecahydro-13-methyl-, [8R-(8a,9b,10a,13a,14b)]-; [8R-(8a,9b,10a,13a,14b)]-Hexadecahydro-13-methylspiro[2H-cyclopenta[a]phenanthrene-2,1'-cyclopropane]