2-((4R,6R)-6-(2-((1S,2S,6R,8S,8aR)-8-((2,2-Dimethylbutanoyl)oxy)-2,6-dimethyl-1,2,6,7,8,8a-hexahydronaphthalen-1-yl)ethyl)-2,2-dimethyl-1,3-dioxan-4-yl)acetic Acid