1H-Cyclohepta[1,2-a:5,4-a']dinaphthalene-3,11(2H,4H)-dione,octadecahydro-4,4,6a,10,10,13a,15b-heptamethyl-, [4aR-(4aa,6ab,7aa,9ab,13aa,13bb,15aa,15bb)]-