<1R*-<1β,3β(1S*),4α,5β>>-1,4,8-trimethyl-3-(1-methyl-2-butynyl)-6-oxo-2,9-dioxabicyclo<3.3.1>non-7-ene

<1R*-<1β,3β(1S*),4α,5β,8α>>-1,4,8-trimethyl-3-(1-methyl-2-butynyl)-6-((trimethylsylil)oxy)-2,9-dioxabicyclo<3.3.1>non-6-ene

<1R*-<1β,3β(1S*),4α,5β,6β,8α>>-6-((tert-butyldimethylsilyl)oxy)-3-(1-methylbut-2-ynyl)-1,4,8-trimethyl-2,9-dioxabicyclo<3.3.1>nonane

<1R*-<1β,3β(1S*,2E),4α,5β,6β,8α>>-3-(3-bromo-1-methylbut-2-enyl)-6-((tert-butyldimethylsilyl)oxy)-1,4,8-trimethyl-2,9-dioxabicyclo<3.3.1>nonane

<1R*-<1β,3β(1S*),4α,5β,8α>>-1,4,8-trimethyl-3-(1-methyl-2-butynyl)-6-oxo-2,9-dioxabicyclo<3.3.1>nonane