Methyl (+/-)-(4'α,4'aS*,5'aβ,6'aβ,10'aα,10'bβ)-decahydro-4',6'a,10'b-trimethyl-9'-oxospiro<1,3-dioxolane-2,3'(4'H)-<2H>phenanthro<8a,9-b>oxiren>-8'-carboxylate

1,1-Dimethylethyl (+/-)-(1'α,4'aβ,4'bα,8'aβ)-3',4',4'a,4'b,5',6',7',8',8'a,9'-decahydro-7'-(methoxycarbonyl)-1',4'a,8'a-trimethyl-6'-oxospiro<1,3-dioxolane-2,2'(1'H)-phenanthrene>-8'acetate

1,1-Dimethylethyl (+/-)-(4'α,4'aS*,5'aβ,6'aβ,7'aα,10'aα,10'bβ)-decahydro-8'-(methoxycarbonyl)-4,6'a,10'b-trimethyl-9'-oxospiro<1,3-dioxolane-2,3'(4'H)-<2H>phenanthro<8a,9-b>oxiren>-7'-acetate

(+/-)-(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