(3R,4aR,4bS,8aR,10aR)-3,4,4a,4b,5,6,7,8,8a,9,10,10a-dodecahydro-3-hydroxy-1,1,4a-trimethylphenanthren-2(1H)-one

(4aR,4bS,8aR,10aR)-1,1,4a-trimethyldodecahydro-1H-spiro[phenanthrene-2,2'-[1,3]dioxolane]

(4aR,4bS,8aR,10aR)-3-tert-butyldimethylsilyloxy-4a,4b,5,6,7,8,8a,9,10,10a-decahydro-1,1,4a-trimethylphenanthren-2(1H)-one

(4aS,8aS,10aR)-1,1,4a-trimethyl-4,4a,7,8,8a,9,10,10a-octahydro-1H-spiro[phenanthrene-2,2'-[1,3]dioxolan]-6(3H)-one

(4'aS,8'aS)-6'-[1-Hydroxy-meth-(Z)-ylidene]-1',1',4'a-trimethyl-hexahydro-spiro[[1,3]dioxolane-2,2'-naphthalen]-5'-one