ethyl 4-(((3S,4aR,4bS,8aS,10aR)-2,4b,8,8,10a-pentamethyl-1-vinyl-3,4,4a,4b,5,6,7,8,8a,9,10,10a-dodecahydrophenanthren-3-yl)oxy)but-2-ynoate

((3S,4aR,4bS,8aS,10aR)-3-((tert-butyldimethylsilyl)oxy)-2,4b,8,8,10a-pentamethyl-3,4,4a,4b,5,6,7,8,8a,9,10,10a-dodecahydrophenanthren-1-yl)methanol

(3S,4aR,4bS,8aS,10aR)-3-((tert-butyldimethylsilyl)oxy)-2,4b,8,8,10a-pentamethyl-3,4,4a,4b,5,6,7,8,8a,9,10,10a-dodecahydrophenanthrene-1-carbaldehyde

tert-butyldimethyl(((3S,4aR,4bS,8aS,10aR)-2,4b,8,8,10a-pentamethyl-1-vinyl-3,4,4a,4b,5,6,7,8,8a,9,10,10a-dodecahydrophenanthren-3-yl)oxy)silane