11,12,17-Trimethyl-16,17-dihydro-15H-cyclopenta(a)phenanthrene 15H-Cyclopenta(a)phenanthrene, 11,12,17-trimethyl-16,17-dihydro- 16,17-Dihydro-11,12,17-trimethylcyclopenta(a)phenanthrene 5831-17-4