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