6-((1S,2S,4aR,6S,8aR)-6-((tert-butyldimethylsilyl)oxy)-2-(((2-methoxyethoxy)methoxy)methyl)-5,5,8a-trimethyldecahydronaphthalen-1-yl)hex-1-en-3-one

(R)-1-(2-((1S,2S,4aR,6S,8aR)-6-((tert-butyldimethylsilyl)oxy)-2-(((2-methoxyethoxy)methoxy)methyl)-5,5,8a-trimethyldecahydronaphthalen-1-yl)ethyl)-4a,7,7-trimethyl-4,4a,5,6,7,8-hexahydronaphthalen-2(3H)-one