Synonyms: Cyclopropa[16,17]cyclopenta[a]phenanthrene,3'H-cycloprop[16,17]estr-16-ene deriv.; Cyclopropa[16,17]cyclopenta[a]phenanthrene,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16a-hexadecahydro-13-methyl-, [8R-(8a,9b,10a,13a,14b)]-; Cyclopropa[16,17]cyclopenta[a]phenanthrene,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,20-hexadecahydro-13-methyl-, [8R-(8a,9b,10a,13a,14b)]-; [8R-(8a,9b,10a,13a,14b)]-1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,20-Hexadecahydro-13-methylcyclopropa[16,17]cyclopenta[a]phenanthrene