5βH-2-<<(tert-butyldimethylsilyl)oxy>methyl>-6β-<2-(methoxymethoxy)ethyl>-7,7-dimethylbicyclo<3.3.0>oct-1-en-3-one

6-(2-Methoxymethoxy-ethyl)-5,5-dimethyl-oct-7-en-2-yn-1-ol

methyl 2-((1R,3aR,6aR)-1-(2-hydroxyethyl)-2,2-dimethyl-4-methylene-5-oxohexahydropentalen-3a(1H)-yl)acetate