17-Isopropyl-3-meth­oxy-13-methyl-7,8,9,11,12,13,14,15,16,17-deca­hydro-6H-cyclo­penta­[a]phenanthrene

The steroid ring B of the title compound, C₂₂H₃₂O, is in a half-chair conformation. The five-membered ring is in an inter­mediate form between the envelope and half-chair conformations.

(3R,5S,6S,8R,10S)-8-Acetyl-7-hydr­oxy-3-isopropenyl-10-methylperhydro­phenanthren-1-one

In the crystal structure of the title compound, C₂₀H₃₀O₃, there is an intra­molecular hydrogen bond between the hydroxyl and acetyl groups [O...O = 2.722 (3) Å].