Cycloaraneosene

(1R)-7-Isopropyl-4-methylene-1α,9aα-dimethyl-1,2,3,3aα,4,5,6,8,9,9a,10,10aβ-dodecahydrodicyclopenta[a,d]cyclooctene

(6aR)-3-Isopropyl-1,2,4,5,6,6aβ,7,8,9,9aα,10,10a-dodecahydro-6-methylene-9β,10aβ-dimethyldicyclopenta[a,d]cyclooctene