(+/-)-(4'α,4'aS*,5'aβ,6'aβ,10'aα,10'bβ)-Octahydro-4',6'a,10'b-trimethylspiro<1,3-dioxolane-2,3'(4'H)-<2H>phenanthro<8a,9-b>oxiren>-9'(5'aH)-one

(+/-)-(4'α,4'aR*,5'aα,6'aβ,10'aα,10'bβ)-Octahydro-4',6'a,10'b-trimethylspiro<1,3-dioxolane-2,3'(4'H)-<2H>phenanthro<8a,9-b>oxiren>-9'(5'aH)-one